Wednesday, July 4, 2007

The Construction Phase of an IT Project

The construction phase of an IT project involves building the application using the agreed-upon environment and specialized tools. Developers create the application by using the design document as their guide.

During the construction phase, the project manager (PM) doesn't actually take part in conducting the components, but must have an understanding of each, so that he or she can oversee the project in a monitoring role. The components of the construction phase of the IT project life cycle are described below.

1. Inputs
The only input needed for the construction phase is the design document created during the design phase of the life cycle. The design document input is used as an outline for the development team to follow. It identifies what the final product should do, how it should function, and any necessary technical details.

2. Key activities
The key activities for the construction phase are preparing the detailed design and performing the programming. To complete the first key activity, which is to prepare the detailed design for each work unit, you should use the technical design as your guide. The steps for completing the detailed design are listed below.
  • Complete the technical design. Complete any outstanding design work and estimate the impact of any design changes.
  • Design the work units. Review the technical design and plan the individual work units for the application. A work unit is a logical portion of the project that can be designed and developed independently from another part of the project and then integrated as needed later.
  • Complete the database design. Document the logical data structures and data areas used in each programming work unit and make this documentation available to the project's programmers.
  • Review the performance design. The complete project team, along with end users, conduct a review of the programming work unit design to ensure that the design meets functional and quality requirements. This review helps ensure that the programmers understand the requirements and that the design is feasible.
  • Iterate the detail design. After the design review, the preceding steps are conducted as many times as necessary to enable the project team to refine the design.
  • Prepare the common test data. Construct a master test database with which to test each work unit. The database may contain the testing methods, test data, expected results, user instructions, and possible sample documents for use in the testing.
3. Tools
The primary tools needed to conduct the construction phase of the IT project life cycle are the specific programming languages and compilers that the programmers will use to create and test the programming code.

4. Outputs
The outputs of the construction phase of the IT project life cycle are the code, programming work units, test database, and unit/string test results. Once the outputs of the construction phase are complete, you will have a working application that can be tested during the next phase of the IT project life cycle. More information about the outputs is provided below.
  • Code. Using a programming language, programmers write a sequence of instructions that translates the product design into a language that a computer can understand. The instructions are referred to as the program source code or the executable code.
  • Programming work units. Programming work units are an output of the detailed design key activity and are used as the basis for the development of the code.
  • Test database. A set of common test data is developed to provide quality control for unit testing.
  • Unit/string test results. The actual test results from unit tests—and if applicable, string tests—need to be documented and preserved as part of the project documentation.
5. Milestones
The final component of the construction phase for the IT project life cycle, the milestones, must be met before the project can move on to the next phase of the life cycle. The milestones that must be reached during the construction phase of the IT project life cycle are the code review complete form and the string test sign-off.
  • Code review complete. Once the review of the code developed during the construction phase is complete, the PM can sign off the code review complete milestone.
  • String text sign-off. The PM signs the string test sign-off to indicate acceptance of the string test results and implies the completion of unit testing.
Using the design document as a guide, developers construct the application that meets the requirements of the user. Once the milestones of the construction phase have been met, you are ready for the next phase: testing the application.

3 comments:

Byggestyring said...

The Construction of an IT Project is a very difficult way, because you need to do some methods like trial and error after that you need to test it again for debugging. And you need to guaranteed the lifetime and consistency of your software. I like your blog and its really interesting thank you for posting.

John Michle said...

Some facts and other points given here are quite considerable and to the point as well, would be better to look for more of these kind for efficient results for your business.

Construction Service Management Software

Elizabeth Alexander said...

Interior Design - describes a group of various yet related projects that involve turning an interior space into an effective setting for the range of human activities that are to take place there. 
http://www.allevaconstruction.com/services/construction-design.html