What is the order of architectures that introduce the least to most performance instability?

Which section of a performance test script is typically responsible for ensuring the script will have the right values and communication settings during execution?

What is normally performed within the principal performance testing activity called Test Planning and Control?
i.Determine scope of performance testing
ii.Organize test cases into performance test procedures
iii.Create the test environment
iv. Identify risks to the performance tests
v. Determine load levels, timing parameters, and transactions to be tested

Which of the situations test adheres to general performance testing principles?

How Is transaction elapsed time determined?