What is \'S\' curve? What is \'test/QA metrics?\'
I am new to this forum. While going through some topics I came across 'S' Curve and 'test/QA metrics '. Can anybody explain me what are these terms mean?
Re: What is \'S\' curve? What is \'test/QA metrics?\'
In general, an "S-curve" is a plot of cumulative progress against time, which, in practice, typically follows the shape of the letter "S," hence the name. Generally you consider it in relation to some aspect of your project management tasks. For example, you might look at project cost against time or maybe person-hours against time.
You will generally use S-curve plots to show planned and actual percent completion for the total project and the critical path activities within the project, particularly if you use some sort of iterative model. (Also note: you will sometimes see these called Rayleigh curves, but that term is really more appropriately used in scientific concepts.)
Metrics are, of course, just a form of measurement. The old time focus on metrics was one-dimensional (output). Now the focus is more multidimensional (outcome) - meaning you are considering not just the results, but the processes and activities that gave the results. Examples of this might be test coverage metrics: the ratio of tests completed relative to a given area of the product or to the entire product.
Decision coverage metrics reports the number of tested decision outcomes in the module.
Function test coverage, which is FE/FT, where FE is the number of test requirements that are covered by test cases that were executed against the software and FT is the total number of test requirements. (This is part of the IEEE.)
Performance metrics, such as throughput per time interval of execution, page views per second, HTTP errors per unit time, etc.
You can also consider defect type metrics, such as defects per 1000 lines of code, developer-months to find and fix defects, etc.
In general just keep in mind: a metric is a form of measurement for you to gather some idea of how things stand in a quantitative (as opposed to just qualitative) manner.