Within the context of the software process and the projects that are conducted using the process, a software team is concerned primarily with productivity and quality metrics-measures of software development "output" as a function of effort and time applied and measures of the "fitness for use" of the work product that are produced. For planning and estimating purposes, your interest is historical. What was software development productivity on past projects? what was quality of the software that was produced? How can past productivity and quality data be extrapolated to the present? How can it help you plan and estimate more accurately