Successful Software Development, Second Edition in .NET Generation ECC200 in .NET Successful Software Development, Second Edition ean13+5 for

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Successful Software Development, Second Edition generate, create none none with none ean 13 c# Prototyping. A three-cycle none for none life cycle that uses prototyping to refine requirements that are not well understood..

Intelligent Mail Information engineering. A six-stage life cycle that uses information engineering to develop a logical design that is then used to generate the physical implementation using a computer-aided software engineering (CASE) tool..

These three examples provi none for none de additional insight into the planning of software systems development projects. The purpose here is merely to introduce these "tailored" life cycles for your consideration when you define your own specific management, development, and product assurance tasks. These life cycles are presented from the seller"s perspective because the seller is responsible for developing the product.

In some instances, the SOW may specify that a customer"s life cycle is to be used. The seller"s project plan should take into account a learning curve for implementing what may be an unfamiliar software systems development life cycle. Traditional Systems Engineering Life Cycle Example The first of our three life cycle examples is Figure 2-6.

This figure depicts the generic fourstage life cycle as the following six-stage systems engineering life cycle:. Successful Software Develo pment, Second Edition Figure 2-6 This six-stage life cycle gives added visibility to the design activity by dividing the HOW into two separate stages PRELIMINARY DESIGN and DETAILED DESIGN. Such added visibility is desirable when the HOW is assessed to be particularly risky. The example activities shown above need to be addressed in the project plan for each life cycle stage.

The plan should account for multiple iterations of the activities shown in correspondence with the risk assessed for these activities.. Requirements definition Pr none none eliminary design Detailed design Coding Production/Deployment Operational use. Each of the six stages is described below. Successful Software Development, Second Edition Requirements Definition St age Activity in this stage focuses on what the software is to do that is, the functions to be performed by the integrated operation of hardware, software, and people. At this stage of the software life cycle, it may not be evident what each of these three generic system components is to do. The boundaries separating these components from one another may be amorphous.

However, these boundaries will be better understood as the actual project work unfolds. Over the life cycle of the system, the elements of this subset may change as decisions are made regarding what the hardware is to do and what the people are to do (and hence what the software is to do). The management tasks include monitoring the assessed risk and planning risk-mitigation strategies as needed.

Management refines planned budgets and schedules. It is important to establish the change control board (CCB) early on in the life cycle. As the project progresses, both the customer and seller refine their understanding of what needs to be done.

These project dynamics result in the need torefine planned activities. To specify and agree to refinements, the customer and seller use the CCB meetings as a forum for recording the agreed-upon refinements. Assessing risk, planning risk-mitigation strategies, detailing budgets, holding CCBs, etc.

, continue throughout the life cycle stages (as indicated by the dashed arrow in the figure). Once the software system is built, management decides whether the system is ready to ship to the customer. Input into this decision comes from the visibility that the product assurance acceptance testing activities provide.

Acceptance testing helps management answer the following question: Does the built system do what it is supposed to do Once the system is shipped to the customer, seller management solicits customer feedback to ensure, in part, proper system operation. During operational use, management monitors customer feedback and determines if there is follow-on work. The development tasks include developing an operational system concept.

Depending on the overall size of the project, the concept may consist of a one-page graphic, a detailed written report, or something in between. The description of each software function embodied in the operational system concept may simply be a one-sentence definition or one or more paragraphs amplifying particular aspects of the function (e.g.

, its scope, qualitative performance, characteristics, and/or subfunctions). For example, a requirements specification for a system to count the number of rain days during a month may contain a statement such as the following: The software shall maintain monthly counts of the number of days during the month when rain fell. As the project unfolds, the Requirements Definition Stage may be revisited and the requirements specification may be further detailed as follows: If rain totaling at least 0.

02 inch fell during the 24-hour period, the number of rain days shall be incremented by one. Various standards exist for writing software requirements specifications. The Institute of Electrical and Electronics Engineers (IEEE) produces one such standard.

[3] This standard, first issued in 1984 and republished with revisions in 1994, defines eight characteristics of a good. "IEEE Recommended Practice none none for Software Requirements Specifications." IEEE Standard 830-1993 (New York: Institute of Electrical and Electronics Engineers, Inc., April 8, 1994).

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