Software Quality assurance and Testing (Job II)

1. What are the methods for estimating software workloads?

Two commonly used methods of estimation:

Method for estimating Pert sizing

Pert sizeing is a weighted average method that can be used to estimate the workload of a software project. In estimating each task, the first estimate is given in the best, probable and worst three cases, recorded as A,b,c;

The expected value is then calculated using the following formula, the so-called final estimate:

Expected value = (A+4*B+C)/6

Delphi Estimation Method

The estimation process is as follows:

Comparison of two evaluation methods:

	Delphi	Pert
Accuracy	Be conducive to independent thinking and gradually clear, by the individual will influence small, the estimated result is more accurate	Affected by human factors, large disturbance, the accuracy is slightly worse.
operability	High workload input, not easy to understand, longer estimate time	Easy to operate, easy to understand, short time to use
Suitable for projects	Suitable for initial estimation of project start-up phase	Suitable for critical estimates in the event of tight deadlines or late in the project.

Software Quality assurance and Testing (Job II)