Question

3. Specify a technique that you think could be used to determine the validity and a technique that you think could be used to determine the completeness of gathered requirements for an automated in-store supermarket shopping system?

Answer 1

1. Checking Validity:

• Requirements Review: This means that the engineer thoroughly analysis the requirements of the system after a detailed discussion with the client. The engineer himself systematically studies the requirements and tries to find answers to all the situations that might arise.
  For the in-store supermarket shopping system, the developer should take help from previous projects to gauge the scope of requirements of the system. Having detailed interviews and discussions with the stakeholders will also help in better review of the requirements.

2. Checking Completeness:

• Prototypes: This involves developing a model of the system and using it as a preliminary device to check for real world use. Many hidden requirements can be unveiled using a prototype. Some modules might also be deemed unusable or redundant (not required).
  In the case of in-store supermarket shopping system, a model of the system can be deployed in a few stores to verify their performance. All data/feedback received from these prototypes will be helpful in developing the final system.
  
• Test-Cases: Generating as many test cases as possible also helps to check the validity of the system by mimicking real world scenario. The testing can be done by the developers and/or the users.
  The developer can use previous similar projects to find test cases for the in-store supermarket shopping system. Other general test cases applicable for all systems should also be run to check for robustness of the system. .