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When there is inadequacy in the requirements of the project it greatly impacts the outcome of the project. Glass law has identified that in most of the failed cases of the project, the insufficient, ambiguous, changing and underestimating requirement have played a major role. This denotes that there is a strong connection between the quality of the requirement and the final result of the project.
Examples of Glass's Law:
Baggage Handling System in Denver International Airport – The main fault in this project is the undervaluation of architecture complexity and high change in the requirement at all stages.
Boehm’s first law:
All the projects are prone to some kind of errors. If the errors that are rectified at the initial stage that is during the requirement phase or during the design phase, then the project can be completed on time and with least budget. In case the errors are neglected or not validated in initial stages, there is a high risk which leads to project delays and cost of the project increases many fold.
Federal Bureau of Investigations (FBI) – USA – This project is a failure due to lack of handling the errors at the initial stage of the project. More than $170M USD has been spend on the project and finally the project has been scrapped and completely new project has been taken up.
Boehm’s second law:
Boehm's second law states that Prototyping aid to significant reduction in design errors and moreover the prototyping is completely user-friendly and helps in providing feedback. Prototypes allow customers to clearly understand project concepts and it is utilized to share ideas with developers with respect to the project.
To illustrate, Boehm’s second law we take the example of development of 3D space-planning. The main objective of this project was to design a 3D application which can be easily accessed by a wide range of nontechnical users. The prototype was made to display user to choose furniture from an online catalog.
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