External entities are objects outside the system‚ with which the system communicates. External entities are sources and destinations of the system’s inputs and outputs. 1.b) ENTITY RELATIONSHIP DIAGRAM Entity–relationship model (ER model) in software engineering is an abstract way to describe a database. This article refers to the techniques proposed in Peter Chen’s 1976 paper.An ER model is an abstract way to describe a database. There are three basic elements in ER models: Entities are
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• The IT-BPM sector in India is estimated to expand at a CAGR of 9.5 per cent to USD300 billion by 2020. The sector increased at a CAGR of 25 per cent over 2000–13‚ 3-4 times higher than global IT-BPM spend • India is the world’s largest sourcing destination‚ accounting for approximately 52 per cent of the USD124–130 billion market. The country’s cost competitiveness in providing IT services‚ which is approximately 3-4 times cheaper than the US continues to
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Lecture 1. Software Engineering Introduction‚ Objectives‚ Professional and ethical responsibility Objectives 1. To introduce software engineering and to explain its importance 2. To set out the answers to key questions about software engineering .3. To introduce ethical and professional issues and to explain why they are of concern to software engineers Software engineering The economies of ALL developed nations are dependent on software. More and more systems are software controlled.
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Ermack B. Verzel June 26‚ 2013 Assignment Software Engineering 1. As software becomes more pervasive‚ risks to the public (due to faulty programs) become an increasingly important concern. Develop a realistic doomsday scenario where a failure of a computer program could do great harm (endanger human life or economies). Tech doomsday scenario: The Net goes down News flash: The Internet melted down today as millions of Web surfers found themselves redirected to the wrong sites
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Software Crisis Software crisis was a term used in the early days of computing science. The term was used to describe the impact of rapid increases in computer power and the complexity of the problems which could be tackled. In essence‚ it refers to the difficulty of writing correct‚ understandable‚ and verifiable computer programs. The roots of the software crisis are complexity‚ expectations‚ and change. The major cause of the software crisis is that the machines have become several orders
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Application Software John Hassler Professor C. Mason Computer Information systems 204 September 13‚ 1996 Computer systems contain both hard and software. Hardware is any tangible item in a computer system‚ like the system unit‚ keyboard‚ or printer. Software‚ or a computer program‚ is the set of instruction that direct the computer to perform a task. Software falls into one of two categories: system software and application software. System software controls the operation of the computer hardware;
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SOFTWARE TESTING SOFTWARE TESTING Testing is the process of executing a program with the intent of finding errors. TESTING PRINCIPLES All tests should be traceable to customer requirements. Tests should be planned long before testing begins. The Pareto principle applies to software testing. Stated simply‚ the Pareto principle implies that 80 percent of all errors uncovered during testing will likely be traceable to 20 percent of all program components. TESTING PRINCIPLES Testing should begin
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TORA Temporary-Ordered Routing Algorithm (TORA) – An Operations Research Software TORA is an algorithm i.e. a mathematical set of instructions or programs (mathematical-software). It is an optimization system in the area of operations research which is very easy to use. Further‚ TORA is menu-driven and Windows-based which makes it very user friendly. The software can be executed in automated or tutorial mode. The automated mode reports the final solution of the problem‚ usually in the standard
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application development as an aspect of ICT there has been a huge improvement in the availability and portability of applications in our day to day business transactions. Mobile application development is the course of action by which application software is designed and developed for hand-held devices like mobile phones‚ personal digital assistants‚ etc. With regard to the Agricultural sector most
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1. In assessing the value of Precise SQL for the user firm one has to consider increase in DBA productivity. Assuming 52 weeks in a year‚ how many hours does a DBA save in a year because of Precise? 3 Points DBA Hours Saved per year 52 * 9.4 488.8 DBA Hourly Wage (assuming 40 hours to a week) 3 Points Unburdened DBA salary $60‚000 Hours worked Per Year 52 * 40 2080 Burdened DBA salary 1.33*$60‚000 $79‚800 DBA Hourly Wage (unburdened) $60‚000/2080 $28.84 DBA Hourly Wage (burdened)
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