The accuracy of a software project estimate is based on a number of things:
(1) the extent to which the planner has properly estimated the size of the product to be built,
(2) the ability to estimate the size of the human effort to translate, calendar time and dollars (a function of the availability of reliable software metrics from past projects),
(3) the extent to which the project plan reflects the capabilities of the software team, and
(4) the stability of the product requirements and the environment that supports the software engineering effort..
(1) the extent to which the planner has properly estimated the size of the product to be built,
(2) the ability to estimate the size of the human effort to translate, calendar time and dollars (a function of the availability of reliable software metrics from past projects),
(3) the extent to which the project plan reflects the capabilities of the software team, and
(4) the stability of the product requirements and the environment that supports the software engineering effort..
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