Monday, December 23, 2019

The Blue Planet - 842 Words

Marine, the word gives us the meaning of produced by the sea. Marinus is the Latin name of marine from which it is originated. A habitat is a place where communities of organisms live, in such a way that one habitat is recognizably the same for that type but equally recognizably different from another type, like forest differs from pasture, which differs from savannah, which differs from tundra. About 70% of our planet is covered with water. Earth has been nicknamed â€Å"the blue planet† because it looks blue from space. About 96% of this water is marine, or salt water, made up of the oceans covering the Earth. Within these oceans, there are many different types of habitat, or environments in which plants and animals live, ranging from freezing polar ice to tropical coral reefs. These habitats all come with their unique challenges and are inhabited by a wide variety of organisms. Millions of different marine habitats are found till date in the deepest parts of the oceans. [1] In recent years quite a lot of confusion has been propagated about biodiversity and habitats, to the extent that we now firmly believe that we must protect every possible habitat in order to protect biodiversity. But this is not true. Biodiversity and habitats live purely in human minds, and not out there in nature where one encounters only communities. Every community (or habitat as we believe) is made up of species that are also members of other communities (habitats). For instance, a tube worm normallyShow MoreRelatedThe Ideal Weight Of The Stone Essay1654 Words   |  7 Pagesastrology, there are nine planets and all of them play significant role in the life of a human being. Therefore, in order to achieve the positive results which are being offered by these extremely efficient planets, a person can adopt different gemstones as per their association with their corresponding planet. 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We also learn that the color of these two examples is â€Å"blue.† In the Merriam-Webster’s School Dictionary, one of the first definitions of â€Å"blue† is stated as â€Å"The color of the clear daytime sky: a color lying between green and violet in the spectrum.† Even though the definition provided for the word â€Å"blue† contains examples, we are easily able to interpret the meaning of the word â€Å"blue† because of what we were taught growing up. As children begin to mature, their vocabularyRead MoreEssay about Solar System1580 Words   |  7 PagesSolar System Humans live on a small planet in a tiny part of a vast universe. This part of the universe is called the solar system, and is dominated by a single brilliant star-the sun. The solar system is the earth’s neighbourhood and the planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto are the Earth’s neighbours. They all have the same stars in the sky and orbit the same sun. Scientists believe the solar system began about 5 billion years ago, perhaps when a nearbyRead MoreEl Niï ¿ ½os Research Paper897 Words   |  4 Pagesyellows, oranges and reds. The Mid-West are around normal temperatures, while the southern portion of the U.S. including California are cooler than normal. This is shown by the light greens and blues. Discussing El Nià ±os of the past, â€Å"The famous 1982-1983 El Nià ±o was one of the worst on record† (Blue Planet, 2017, para. 3). During this event, the sea surface temperatures raised to an unbelievable 9-18 degrees Fahrenheit above the normal, located over the eastern tropical Pacific Ocean (National GeographicRead MoreNegative Effects Of Rain In America784 Words   |  4 Pagestemperatures associated with different El Nià ±o events, and what to expect across the United States. (Source: National Weather Service – NOAA, 2017) Discussing El Nià ±o’s of the past, â€Å"The famous 1982-1983 El Nià ±o was one of the worst on record† (Blue Planet, 2017, para. 3). During this event, the sea surface temperatures raised to an unbelievable 9-18 degrees Fahrenheit above the ordinary, located over the eastern tropical Pacific Ocean (National Geographic, 2017). This caused numerous complications

Sunday, December 15, 2019

Decades Have Witnessed an Acceleration of Economic Globalisation Free Essays

string(167) " points made above it’s essential to consider the theories of international trade, as comparative advantage is an important concept for explaining pattern of trade\." ‘Recent decades have witnessed an acceleration of economic globalisation, in particular international trade. Is trade openness the key strategy to achieve economic development? What lessons could you draw for policymaking? Support your arguments with economic theory and empirical evidence from developing countries’. Introduction In this essay, I shall critically examine the statement put forward – and test whether trade openness is the key strategy to achieving economic development, and from this consider whether we can conduct further analysis upon whether there are any lessons that can be obtained from this in regards to policy making. We will write a custom essay sample on Decades Have Witnessed an Acceleration of Economic Globalisation or any similar topic only for you Order Now To focus our discussion; using relevant empirical evidence, I will relate this essay primarily towards developing countries, enabling us to gain a clear understanding of the task at hand. It is of importance that we first briefly explore how the literature define and pursue globalisation; this is done in the next section. The remainder of the essay will be dedicated on segments on economic theory of international trade, the relationship between trade openness and economic growth, we will then draw upon empirical evidence, the negatives of trade openness, and lessons for policy making. Finally I will offer my concluding remarks. Before delving into the core aspect of the essay, it’s essential to consider the underlying reason towards trade liberalisation in international trade; globalisation and also provide a definition of trade openness. Globalisation can be considered as an important rhetoric of contemporary international relations. The term globalisation is often invoked to describe the process of increasing interdependence and global enmeshment through a variety of economic, cultural, social and, political changes that have shaped the world over the past five decades. Hurrell Woods, 1995; Guttal, 2007) Globalisation is considered a form of capitalist expansion that entails the integration of local and national economies into a global, unregulated market economy through an increase in international trade by increases in exports and imports of nations which has been widely regarded as being facilitated by international trade agreements post world-war II. The extent of integration is outlined in table 1 where we can see that there has been increase in the ratio of trade to gross domestic product (GDP) when integration had been apparent from 1870 up until 1914 the eve of World-War I. Integration was halted during the periods of the two world wars and the era of the Great Depression. During this period protectionism was rife, which saw the integration of trade and foreign asset ownership revert back close to their levels in 1870. (Dollar, 2005) Table 1: Measures of Global integration Adapted from Dollar (2005) Table 1: Measures of Global integration Adapted from Dollar (2005) In recent decades there have been various literatures invoking continuous debate discussing whether there is positive correlation between economic growth and trade openness. Advocates thoroughly support that trade liberalisation induces an increase in economic growth; whilst critics hold that protectionism is the essence to increased economic growth. The WTO (World Trade Organisation) and GATT (General Agreement on Tariffs and Trade) have shaped and influenced the integration of global markets through much debate, discussion and reciprocation, agreements have been established, aiming to promote the vision and objective of trade openness by lowering barriers to trade. Developing countries have been primarily on the agenda throughout the history of the GATT and WTO in order to promote development in these countries as WTO’s Mike Moore as cited in Rodrik (2001) puts it, â€Å"the surest way to do more to help the poor is to continue to open markets. † Trade Liberalisation Paradigm Vs. Protectionism Paradigm â€Å"More open and outward- oriented economies consistently outperform countries with restrictive trade and [foreign] investment regimes. † OECD (1998, pp. 6, cited in Rodriguez Rodrik,1999) â€Å"Policies toward foreign trade are among the more important factors promoting economic growth and convergence in developing countries. † IMF (1997, pp. 84, cited in Rodriguez Rodrik, 1999) Despite such claims, historically during the 1960s, and 1970s although the GATT aided the reduction of trade barriers, it was apparent that many developing nations continued to venture in the protectionist perspective to facilitate in dri ving economic growth. Nations in Latin America and in some African and Asian nations embraced the idea of f Import Substitution Industrialization (ISI). ISI refers to a trade and economic policy based on the premise that a developing country should attempt to substitute products which it imports (mostly finished goods) with locally produced substitutes. This often times involves government subsidies, high tariff barriers and/or artificially maintained domestic currencies to protect local industries. (Kulkarni and Meister, 2009) Economic authors such as Trebilcock and Howse (1999) hold that their reasoning for adopting such an approach to international trade is that with trade liberalisation protectionist tariffs would have to be reduced, which would in turn hurt domestic production as imports would be considered more attractive than domestic; therefore affecting the long run economic growth of their nation. â€Å"tariffs on industrial products have fallen steeply and now average less than 5% in industrial countries. During the first 25 years after the war, world economic growth averaged about 5% per year, a high rate that was partly the result of lower trade barriers. World trade grew even faster, averaging about 28% during the period. † (Rivera and Olivia, 2004, p. 78) It’s apparent by data presented by Rivera and Oliva (2004) and linked with data available in table 1 that since after the world war policies adopted to ensure unrestricted flow of products and services consequently lead to global competition and innovation which benefits all involved. Krugman (1986) further elaborates that with such trade liberalisation that there are a number of key benefits. Firstly, due to economies of scale enjoyed by nations, economies are able to gain from their comparative advantage. Secondly, there is a rise in intra-industry trade, increasing product differentiation enabling consumer satisfaction to be increased. Finally as Porter (1990) establishes, trade liberalisation ensures nations adopt sound economic policies to increase competitive advantage to ensure foreign investment occurs in their economy. Theoretical Considerations To elaborate on the points made above it’s essential to consider the theories of international trade, as comparative advantage is an important concept for explaining pattern of trade. You read "Decades Have Witnessed an Acceleration of Economic Globalisation" in category "Essay examples" David Ricardo firstly introduces the concept of comparative advantage. It is then well recognized as the Ricardian model. In the neoclassical theory of international trade, Heckscher and Ohlin examine the effect of different factor endowments on international trade. – Theory of Competitive Advantage The basic idea of premise of Ricardo’s model boasts that comparative advantage postulates that a nation will export the goods or services in which it has its greatest comparative advantage and import those in which it has the least comparative advantage. (Ricardo, 1817 cited in Widodo, 2009) For example, it takes less productive inputs to produce clothes in China than in Great Britain. However it takes less productive inputs to produce bread in Great Britain than in China. Given this comparative advantage these China and Great Britain can increase their welfare of consumption by specialising in clothing and bread respectively and trade them. The overall gain from this is that greater economic growth can be attained through the utilisation of other economies comparative advantage. – Factor Endowment theory Coque et al. (2003) furthers the comparative advantage model outlined by Ricardo criticising one area by stating that comparative advantages arise only because international differences in labour productivity. Coque et al. continues by expressing that in the real world, trade also reflects differences in countries’ resources: not only labour, but also other factors of production such as land, capital and mineral resources. The basic premise of this theory is centred that a country will tend to produce relatively more of goods that use its abundant resources intensively. For example, consider two goods and two factors of production (land and labour). The two goods have different factor intensities, that is production of one of the goods use a higher ratio of land to labour than the production of the other. The nation in question has an abundance of land, therefore would specialise in the production of this good which uses land intensively. Husain (2007) identifies that from these free-trade models, countries gain from trade and world output is increased; that the countries will tend to specialise in products that use their resources abundantly; and given identical technologies and production throughout the world, factor prices will equalize across trading countries. By enabling countries to move beyond their production possibility frontiers trade is assumed to stimulate growth by securing capital as well as consumption goods from other parts of the world. Trade thus stimulates economic growth, promotes and rewards those activities in which the country has relative abundance of factors of production. As developing countries poses labour in abundant supply their wages will rise and the majority of the population will be better off compared to no trade scenario. Empirical Evidence Trade liberalisation and growth In regards to the protectionism and trade liberalisation paradigms discussed, a key case study is that of Pakistan. Pakistan’s international trading policy consisted of ensuring a highly protective trade regime until the late 1980s. Tariff rates were excessively high and non-tariff barriers kept competing imports away from the domestic markets. It was only in the 1990s that trade liberalization policies were initiated. During the period of protection the manufacturing and tax revenues grew by less than 5% annually. Once the tariff reforms were adopted manufacturing, revenues and exports have all grown in double digits. This correlation shows that despite the perceived views that protectionism protected the domestic, once policies that promoted trade openness were in place, exports within Pakistan actually increased, due to the comparative advantages they would have held in certain industries. Per Capita GDP Growth Rates, by Country Type, 1990s (%), based on GDP in purchasing power parity terms) Per Capita GDP Growth Rates, by Country Type, 1990s (%), based on GDP in purchasing power parity terms) Figure 1: Per capita GDP Growth Rates by country type in the 1990s Adapted from Dollar (2005) Figure 1: Per capita GDP Growth Rates by country type in the 1990s Adapted from Dollar (2005) Dollar (2005) furthers this argument by presenting evidence from figure 1, which shows three categories; Rich countries (developed industrialised nations), other developing nations (Lack of trade openness) and developing country globalizers (those who have adopted trade openness policy). From the evidence provided it is clear that developing nations that have reformed their trading policies to enable them to become more open have grew substantially than their other developing counterparts who did not. Prabirjit (2007) further adds credence to this discussion by providing empirical evidence on cross-country study of averages and panel regression analysis for a sample of 51 less-developed countries over a uniform time period 1981-2002. Like many other works in this field, the results from this study shows that a country with a higher trade share based on openness tends to experience a higher real growth. Trade liberalisation and inequality Although we’ve been able to provide empirical evidence upon the growth benefits of trade openness, many analysts are legitimately concerned about the effects of trade liberalisation on the distribution of income. Research shows that there’s no evidence of a systematic tendency for inequality to increase when international trade increases. If we consider figure 2, this figure reflects the experiences of more than 100 countries, with changes in trade and changes in inequality measured over periods of at least five years in order to capture long-run relationship between trade and inequality. From the figure 1 we can see that there is no real correlation between changes in trade and changes in inequality. Figure 2: Changes in trade and income inequality Adapted from Dollar and Kraay (2001a) Figure 2: Changes in trade and income inequality Adapted from Dollar and Kraay (2001a) Trade liberalisation and Poverty Reduction One of the most common criticisms of trade liberalization and globalization, particularly in developed countries, is that it drives down wages and exports jobs to low wage economies. As we’ve analysed the combination of increases in growth has little systematic change in inequality, now with such results can we expect to see a reduction in poverty for developing countries. In Malaysia, for example, the average income of the poorest fifth of the population grew at a robust 5. 4% annually. Even in China, where inequality did increase sharply and the income growth rate of the poorest fifth lagged behind average income growth, incomes of the poorest fifth still grew at 3. 8%annually. (Clift and Diehl, 2007) The fraction of the population of these countries living below the $1 a day poverty threshold fell sharply between the 1980s and the 1990s: from 43%to 36% in Bangladesh, from 20% to 15% in China, and from 13% to 10% in Costa Rica. Dollar and Kraay (2002) and Ravallion (2001) support the hypothesis that mean incomes of the poor rise and poverty rates decline with the rise in overall mean incomes. But state reliance on cross – country evidence to make inferences about specific instance is not helpful. Apparent factors which impair the effects of trade liberalisation Nugent (2002) identifies factors which affect the effects of trade openness for example a trade liberalization program may have been well-designed but initiated at the wrong time. Arguments about comparative advantage and gains from trade are more plausible when real world conditions approximate those of the theoretical models used to justify them, namely, equilibrium at full employment. Yet, it was during the extremely turbulent and depression-like conditions of the mid-to-late 1980s and early 1990s that most of the Latin American countries and transition economies of Central and Eastern Europe initiated their trade liberalization programs. Nugent states that one problem is that in such turbulent circumstances, often before stabilisation has been achieved and when both inflation rates and relative prices are very volatile, the price signals exerted by the trade liberalization measures may be either misleading or too noisy to have the â€Å"right† effects on resource allocation. This can be an argument for delaying trade liberalization until after stabilization can be achieved. But, if trade liberalization is delayed, it may mean that the stabilization programs that help raise the prospects for future growth and stimulate investments will do so in the â€Å"wrong sectors†. Yet, the currency depreciation required to offset reductions in tariff equivalents may also trigger inflation. Clearly, there are tradeoffs and problems inherent in these inevitable interdependencies. But, whether, stabilisation occurs before, after or simultaneously with trade liberalization (if at all), it suggests that the need for a well-articulated, coherent and credible program is even greater than would be the case if trade liberalization was to start from a stable, full employment economy. A second problem in which Nugent (2002) identifies is that trade liberalization, and capital market liberalization, is likely to increase the vulnerability of the economy to new kinds of shocks. These shocks can easily be very challenging to policy makers and make it even harder to stick with reforms. Both Chile of the 1970s and Mexico of the mid-1990s were heavily indebted and then buffeted by unexpected shocks in the form of higher interest rates in the US. Indeed, some analysts blame the setbacks of Mexico and Chile in their trade liberalization programs simply to bad luck. Even if this is not entirely true, it is quite true that even if the trade liberalization programs had been well-designed for normal condition over time, they may not have been sufficiently well designed to also withstand the severe external shocks that may be more likely to come in a liberalized economy. Lessons for Policy Makers The weight of evidence suggests that openness to trade is good for growth and that growth benefits the poor. But to enjoy the full benefits of trade liberalization, McCulloch et. al. 2011) state it should be accompanied by sound policies in areas such as transport and communications infrastructure, market facilitation, competition, education and governance. In order to boost the competitive advantage qualities of the environment – subsequently increasing investment within the nation. McCulloch et al (2011) further state that trade liberalization can change the nature of the risk and uncertainty that poor households face although not always for the wo rse. It can also affect their ability to cope with risk and uncertainty. Policies such as improving access to credit markets can help a great deal here along with improvements in asset distribution and in the flexibility of local labour markets. Conclusion In essence to conclude, in comparison to protectionist international trade policies, from empirical evidence presented trade openness as a whole can be considered as a key strategy to achieve economic development, as we have been able to witness an increase of imports for developing nations which in turn increases efficiency and reduces costs, which can be considered more effective than import substitution policies. However as established in this paper, there are various factors in which can affect the effectiveness of trade liberalisation policies, which policy makers must take into consideration. References Clift, J. and Diehl, E. (2007) Financial Globalization: A compilation of articles from Finance Development Washington, D. C. : International Monetary Fund Dollar, D. , 2005, Globalization, Poverty, and Inequality since 1980, World Bank Research Observer, 20 (2): 145-175 Dollar, D. Kraay, A. (2002)   Growth Is Good for the Poor  Journal of Economic Growth, Springer, vol. 7(3), pages 195-225, September. Guttal, S. (2007) Globalisation Development in Practice, Vol. 17, No. 4/5, pp. 523-531 Hurrell, A. and Woods, N. (1995) Globalisation and Inequality, Millennium 24(3): 447–70. Husain, I. (2007) TRADE LIBERALIZATION, ECONOMIC GROWTH AND POVERTY REDUCTION RECENT EVIDENCE FROM PAKISTAN National level seminar on Trade and Economic Growth Linkages, Quai d-e-Azam University at Islamabad. Jose Garcia, M. Coque, A. (2003) Trade and Domestic Policies in Open Economy Available at: www. napcsyr. org/†¦ /tm_trade_domestic_policies_in_open_economy_en. pdf Khan, A. H. , Malik, A. and Hasan, A. H. 1995) Exports, Growth and Causality Pakistan Development Review 34(4): 1001-1012 Krugman, P. (1986) Strategic Trade Policy and the New International Economics MIT Kulkarni, K and Meister, K. P. (2009) Trouble with Import Substitution and Protectionism: A Case of Indian Economy McCulloch NA, Winters LA and Cirera X (2001) Trade Liberalization and Poverty: A Handbook London, Centre for Economi c and Policy Research Nugent, J. B. , (2002) Trade Liberalization: Winners and Losers, Success and Failures, Implications for SMEs Forum Series on the Role of Institutions in Promoting Economic Growth, Washington, D. C. Porter, M. E. (1990) The competitive advantage of nations: with a new introduction Free Press,  New York Prabirjit, P. (2007) Trade Openness and Growth: Is There Any Link? MPRA Paper  4997, University Library of Munich, Germany. Ravallion, M. (2001) Growth, Inequality and Poverty: Looking Beyond Averages World Development, 29(11), 1803-1815. Rivera-Batiz, L. A. Oliva, M. A. (2004) International trade: Theories, strategies and evidence. London: Oxford University Press. Rodrik, D, (2001). The Global Governance of Trade As If Development Really Mattered. Background Paper. New York. United Nations Development Programme. Rodriguez, F. Rodrik, D. (1999) Trade Policy and Economic Growth: A Skepticaâ‚ ¬Ã¢â€ž ¢s Guide to The Cross-National Evidence. In Bernanke, B. S. and Rogoff, K. (Eds. ), NBER Macroeconomics Annua, 2000 (pp. 325-336). London: The MIT Press. Trebilcock,  M. J. and Howse,  R. (1999) The Regulation of International Trade  London: Routledge Widodo, T. (2009) Comparative Advantage: Theory, Empirical Measures And Case Studies  Review of Economic and Business Studies, Alexandru Ioan Cuza University, Faculty of Economics and Business Administration, issue 4, pages 57-82, November. How to cite Decades Have Witnessed an Acceleration of Economic Globalisation, Essay examples

Saturday, December 7, 2019

Comparison Of Different Models (Waterfall - Spiral And Concurrent)

Question: Compare and contrast the waterfall, spiral, and concurrent models. Determine which model is most appropriate for start-up, medium, and large organization. Evaluate of each software process model. Answer: Introduction This particular assignment focuses on analyzing different software development model such as waterfall model, spiral model, concurrent model, etc. However, this study demonstrates the comparison and contrast between above mentioned three models. Moreover, this report also determines the most appropriate model based on the working types of organizations. Finally evaluations of the models are done for deeper understanding. Comparison of Different Models (Waterfall, Spiral and Concurrent) 1. Waterfall model Waterfall model is the oldest software design model and is often termed as the classical approach. Waterfall model is linear and sequential (Alshamrani Bahattab, 2015). Each level represents a complete step, and the final product is obtained after completion of all the steps. 2. Spiral method The spiral method is one of the most used SDLC processes in industry. The spiral method is an iterative development process in which the steps are followed iteratively to reach the outcome decided by (Shukla Saxena, 2013). 3. Concurrent model Concurrent development model also known as concurrent engineering is a series of framework activities involving software engineering tasks and associated states (Highsmith, 2013). This model is best suited for software that is large and depends on multiple teams for its development. Comparison between the three models: Waterfall model Spiral model Concurrent model Model sequence Linear Continuous Sequential Iterative enhancement Understandability Simple Moderate Complex Testing After completion Continuous Continuous Development phases Previous phase should be completed before moving to next phase. Independent phases Phases depend upon each other. Connection between phases No connection Cyclic Interconnected Manageability Easy Moderate Difficult Model rigidity Very high Moderate Extremely flexible Human resource requirement Low Moderate High The above table gives the general overview about the three software model. The comparison shows the advantages and disadvantages of the models over each other. The waterfall model is simpler to understand and is easily manageable compared to other two models but fail to provide the adaptability offered by other two methods. The sequential nature of the spiral and concurrent model is the reason for adaptability. Spiral model updation is done after completion of each phase and finally user update is taken for final update. In concurrent model the phases are interdependent hence update in one phase alters the output for other system, hence making it complex for implementation and need of specialized human resources. Determination of Models for Different Businesses The various business models like start-up, medium and large have different software requirements. Start-up firms have specific requirements like low cost, fast delivery, small and precise needs, and simplicity (Jaspers Hak, 2014). The waterfall model is easier to understand and implement, it is cost efficient and fast with smaller requirements. Hence, waterfall model of software development is the best-suited model for start-up enterprises. Medium enterprises, have necessary capital for development of software. The demands of these companies do change due to expansion; hence the need revolves around better serviceability, lesser risk and faster deliverables (Park Kwag Bae, 2016). The spiral method of SDLC satisfies all the criteria like better serviceability, lower risks and faster delivery with involved costs. So the best-suited software development model for this purpose is the spiral method. Large organizations have greater needs and can hire a better workforce for software development. Hence the best model for such organization is the concurrent development model (Pierce Davis, 2015). The concurrent model is complex and needs a large workforce for its completion; also the product development is faster and is easily adaptable. Therefore the concurrent model is best suited for large enterprises. Evaluation of each Software Model There are various software development models that satisfies different user requirement. The three models are evaluated here for deeper understanding. 1. Waterfall model The model which is oldest of all is linear and sequential. The various steps that are involved in the SDLC are the analysis of requirement, design, coding and development, testing, operation and maintenance (Balaji Murugaiyan, 2012). Each level represents a complete step, and the final product is obtained after completion of all the steps. Hence reviewing and verification is done at each phase before proceeding to another (Alshamrani Bahattab, 2015). The waterfall model can be seen in the following diagram. Figure1: Represents the waterfall model (Source: McCormick, 2012, pp. 5) 2. Spiral model Spiral model is the most used SDLC model in industry. The spiral method is an iterative development process in which the four steps namely, identification, design, construction and evaluation is done iteratively to reach the outcome. This method is very costly as the product life cycle takes high time for implementation (Alshamrani Bahattab, 2015). Also, the product is developed over time to meet new requirements and hence is most versatile SDLC method. The figure below shows the diagrammatic representation of the spiral method. Figure 2: Spiral SDLC method (Source: Shukla Saxena, 2013, pp.1) 3. Concurrent model The concurrent model is one of the most advanced models and is most adaptable. In this model user interaction is possible while tasks are running. Since the processes are independent long running processes dont delay the short running processes. The independent processes leads to parallelism hence ensure maximum utilization of resources. The other disadvantage apart from the above is controllability. The disadvantages of the model are system stability, liveness i.e. always active, non determinism and high resource consumption. The model diagram is shown below: Figure 3: Concurrent model diagram (Source: Hansen, 2013, pp. 259) The figure shows the high resource requirement of the model and high model complexity. Conclusion Every organization has different requirements, the deliverables and some resources decide the course of action for software development. The reviewed models were waterfall model, spiral model and concurrent model. The models were compared and contrasted for a better understanding. Further suitable development model was suggested for a start-up, medium and large organization based on the knowledge. Based on the advantages waterfall model was recommended for start-up businesses, the spiral method of modeling was suggested for medium business, and concurrent method was proposed for large business. Reference Abdullah, D. (2015). Digital Library Information System Development at Malikussaleh University with SDLC (System Development Life Cycle).International Journal of Computing and Technology-IJCAT,2(7), 232-239. Alshamrani, A., Bahattab, A. (2015). A Comparison Between Three SDLC Models Waterfall Model, Spiral Model, and Incremental/Iterative Model.International Journal of Computer Science Issues (IJCSI),12(1), 106. Balaji, S., Murugaiyan, M. S. (2012). Waterfall vs. V-Model vs. Agile: A comparative study on SDLC.International Journal of Information Technology and Business Management,2(1), 26-30. Hansen, P. B. (Ed.). (2013).The origin of concurrent programming: from semaphores to remote procedure calls. Springer Science Business Media. Highsmith, J. (2013).Adaptive software development: a collaborative approach to managing complex systems. Addison-Wesley. Jaspers, F., Hak, T. (2014). STARTUP BUSINESS MODELING: A LONGITUDINAL STUDY (INTERACTIVE PAPER).Frontiers of Entrepreneurship Research,34(4), 14 McCormick, M. (2012). Waterfall vs. Agile Methodology.Retrieved February 12, 2014. Park, E. Y., Kwag, D. G., Bae, S. U. (2016). A Study on the Market Competitiveness of Small-to-Medium Sized Businesses Utilizing CBMI (Convergence Business Model Innovation).Indian Journal of Science and Technology,9(26). Pierce, R. D., Davis, M. A. (2015).U.S. Patent No. 9,069,820. Washington, DC: U.S. Patent and Trademark Office. Shukla, A. K., Saxena, A. (2013). Which Model is best for the Software Project?" A Comparative Analysis of Software Engineering Models".International Journal of Computer Applications,76(11).