People who need the test specifications:

1. Test Constructors needs to know

• who is sitting for the tests
• what's the purpose of the tests
• what contents to cover 
• about the methods to use
• how many parts/sections for the tests
• the duration allocated for the tests

2. Test users need to know

• the descriptions of the tests' contents
• the scores allocated for each part/section
• the criteria for marking

3. Teachers/Educators need to

• decide what tests are suitable for their students
• prepare their students for the respective tests
• know how the marking criteria are
• get some samples of previous test questions as guidance

4. Admissions officer need

• the description of the tests to help them decide the validity for further action
• to see if the tests measure up to academic-related requirements e.g. language level, serves admissions purposes

5. Publishers want to

• produce textbooks/workbooks related to the requirements of the tests
• ensure that the practice tests have suitable levels of difficulty with the right measure of contents, topics, tasks etc