1.2.5 - Describe methods of obtaining requirements from stakeholders.
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Give 3 advantages of surveys.
1) A large amount of data from a large group can be gathered. 2) Takes little time to analyse (if done electronically). 3) They’re simple.
Give 4 disadvantages of surveys.
1) It’s hard to ask the “right question”. 2) Information gathered is limited by questionnaire. 3) Can be biased. 4) Quality of responses not ensured.
Give 2 advantages of interviews.
1) They allow a lot of very detailed information to be gathered. 2) People can be asked about what they don’t like about the system.
Give a disadvantage of interviews.
They take a long time.
Give an advantage of direct observation.
First-hand, unbiased information can be gathered.
Give a disadvantage of direct observation.
Often people might not work the way they normally do when being observed.
Describe collecting documents as a method of obtaining information about a system.
Collecting documents involves looking in the documents currently being used in the system to try to find out how it works.
Give 2 advantages of collecting documents.
1) Detailed information about the present system can be gathered. 2) It can be seen where the old system has problems.
Give 2 disadvantages of collecting documents.
1) Time consuming. 2) Just looking at the forms/outputs may be confusing.