Software Development Life Cycle and Testing

These five phases constitute the life cycle of a software project called the software development life cycle (SDLC).

The Five Phases of the SDLC:
1. CONCEPTION
2. INITIATION
3. ANALYSIS
4. DESIGN
5. CONSTRUCTION

Phase 1 – CONCEPTION: This phase starts as soon as someone, either a user or a member of the data processing department, recognizes a problem or opportunity that suggests a data processing solution.
The objective of this phase is to answer the following questions:

– What is the perceived problem (or opportunity)?
– What are the goals to be achieved by the solution?
– What benefits will result from achieving the solution?
– What will be the scope of the project?

These details may be recorded in an informal note or in a formal document. This document is called Project Request Form.

Phase2 – INITIATION: In this phase the analyst, working with the user, does a preliminary study of the user’s need. The information developed during this phase permits the organization to decide if it is worth spending money on the project.

The key information to be recorded consists of the following:

– Proposed system solution
– Alternative solutions considered
– Economic justification (Cost Benefit Analysis)
– Schedule of time and cost estimates for the completion of the project

This document is referred to as System Proposal.

Phase 3 – ANALYSIS: During this phase, the analyst and user come to a detailed agreement on the functions that the proposed system has to perform. A detailed document is prepared containing:

– Outputs to be produced
– Inputs that must be received
– Data to be retained
– Procedure to get the outputs from the given inputs
– Audit and control requirements: This specifies the features that are required to ensure that the user can monitor the system to check that it is working properly.

– System Acceptance Criteria: This lists the tests that the user would actually perform to check conformity with the previously agreed performance requirement and other specifications, before accepting the system.

This document is called Function Specifications. In addition to creating Function Specifications, the Cost Benefit Analysis prepared during the Initiation phase should be reviewed for accuracy. Similarly, the cost and time estimate should also be reviewed/revised.

Phase 4 – DESIGN: At this point, the emphasis changes from defining the user’s requirement to defining how the system will work. The documentation developed is technical. The design documentation should specify:

– Exactly how each input, output, operation, file and audit control requirement will be handled
– Acceptance test plan/schedule
– Facilities, equipment and personal required
– Manual procedure required to operate the system

This document is referred to as Design Specification. At this point again, the Cost Benefit Analysis and cost/time estimates are reviewed /revised.

Phase 5 – CONSTRUCTION: The last phase in the system development procedure includes three activities:

– Completing and testing computer programs and operating instructions for using the package (Run Manual, User Manual).
– Performing all tasks to carry out the conversion from the system currently in use to the new system.
– Conducting the final testing of the system to determine if it performs according to the acceptance criteria established during the Analysis phase.

Another essential activity for any system is the system evaluation. During system evaluation the performance of the system in a real life environment is assessed.

This is not considered a phase as:

– It may be several months before it is possible to take the first measurement of system effectiveness.
By this time the project development team might have been disbanded or moved to other projects.
– It is an ongoing activity. In fact, it should be regarded as a project in itself.
– The results of the system evaluation might indicate that the system has to be modified /re-developed.

Testing:
Software Testing is the course of completing a program or system with the intention of finding errors. Or, it involves any activity aimed at appraising an attribute or capability of a program or system and determining that it meets its required results.

The testing process:
1. Create test plans.
The test plan documentation consists of two documents:
• Detailed test plan (DTP) document
• Detailed test case (DTC) document
2. Review the design.
The design review also helps in identifying the scenarios that must be tested for one or more of the following:
• Possible security attacks
• Performance optimizations
• Profiling to ensure that there are no memory leaks
3. Perform black box testing.
Black box testing includes the following:
• Testing all of the external interfaces for all possible usage scenario
• Ensuring that the interfaces meet the functional specifications and address all of the requirements testing for various types of input.
• Testing for various types of input.
• Performance testing
• Load testing.
• Stress testing
• Security testing

New Era Of Custom Software Development

To sustain in this world full of competition, business has to be very effective. The emergence of the New Era of Custom Software Development Company in India has an unyielding experience in development of Custom Solutions. Software Development Company systematically analyzes the business and product requirements, and delivers customized cost-competitive, scalable and vigorous solutions.

Now a day simple software wrap up is not adequate for today’s businesses, instead, Custom web Software is a great choice. For this purpose, Software Development Company in order to satisfy the customer can build, organize and preserve a variety of technology solutions for a variety of businesses across the globe. The core focus is always on developing systems and software that allow business to be dynamic and elastic allowing space to always be in competition in the business market. If the organizations, concentrates to take on custom software application for their business it helps solves other problem that is amount of money involved.

Outsourcing Software development projects to India helps in solving unique problems of the organizations as the company absolutely gels with the requirement of new or existing projects, including analysis, database design, coding, testing and implementation. Transparent project management and change management practices that accentuate customer communication at prearranged intervals through e-mail, teleconferencing and video conferencing guarantee that the customer and project delivery teams carry a consistent understanding of requirements and project status at all times. Custom Software development Companies in India instead of changing the business practices that are already streamlined, think that it makes perfect sense for a business to go for the tailor-made software. Custom software development is nothing but the software made as per the requirements of the client applicable for that particular business’s needs.

Owing to the increasing offshore demand of customization, Software Development Company has started focusing on “Mass Customization”. Mass Customization is a process that combines the low costs of mass production processes with the flexibility of individual customization. The advent of new interactive technology, “Internet”, allows customers to interact with a company and specify their unique requirements, which in turn are manufactured by mechanized systems. Software Development Company have top rank industry qualified software development professionals like project managers, software engineers and programmers, testers, designers and technical writers with exclusive skill sets for developing Custom Software’s. The Custom Software Developer specializes in developing an idea into software suggested by a specific customer.

The Software is specifically designed for a customer thus; it cannot be sold or given to other buyers. Client dedication is the approach. First, attention to the integrity and ethics a company demands because there is strong need of comfortable interaction. Second, understanding the business allows leading it to the next level. The aim is to perfect the services of the Software Development Companies to trim operational costs, improve quality and free internal resources for other purposes.

Software Development Explained

Most of us don’t even know what software development means. Let me explain. Basically it means that someone works to develop or create new software, usually to meet the needs of business owners, for the personal use of the user, or to supply the potential needs of a client.

Developing new software usually is perceived as ‘computer programming’ to most people. That is only part of the process. There is much research that has to be done in the development of new software programs. This often involves many modifications, engineering and re-engineering, and maintenance of the finished product before it is declared ready for use by the general public.

The software developer is usually someone who’s main concern is with the many facets of the process. Their involvement is often guided by lead programmers during the developing of the software programs. It often takes a long time and no small amount of luck to develop a program that is finally free of glitches typically found in new software programs.

Programmers are the people who typically write the source codes, and the developers are often involved in many other aspects of the process, including, but not limited to specifications, designs, implementations and maintenance to name a few. Certain employees may have a single responsibility in just one of these phases of development, yet in a smaller place of business, it might be that just one employee would take on all of the tasks involved.

Companies take different approaches to how they develop software. Often it is regimented and structured when it pertains to business software. Other companies develop the software one step at a time. However the approach, there are some of the same combinations of methodologies used in the development of new programming.

A methodology in software language means a framework is developed that will structure the development process of new informational systems. Many frameworks have been used over a period of years, and what might be right for one project may not necessarily work for another. This is why new frameworks are being developed and used more often.

The same strategies are employed in both large and small companies. All involved employees would meet to discuss requirements, and proposals and recommendations are usually made at this time. The design work is worked out and clarified. Anything that needs to be updated is done now, and the developers can begin the job or working on the system. Once all this is completed, the system is delivered. Security measures are tested, and any glitches or bugs are worked out to everyone’s satisfaction. The system is deemed complete and is now ready to be distributed and used.

So, there you have it. The capsulized version of how new software is developed, and a brief discussion on who does the work that brings new and exciting developments to the software field. Assuredly there is a lot more to it than what I have discussed, but I think I have included enough information to give one a general idea behind it all.

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