1. A computer program product for estimating install time, the computer program product comprising: a computer readable storage medium having computer usable program code embodied therewith, the computer usable program code to: identify a timing parameter that influences the install time for installing a product on a plurality of sample computing machines in a test environment in accordance with an installation operation; for each of the plurality of sample computing machines, determine a test value of the timing parameter for the sample computing machine based on execution of timing parameter test operations associated with the timing parameter; determine a test value of the install time for the sample computing machine based on execution of the installation operation; and determine a timing coefficient for the timing parameter based on the test values of the timing parameter and the test values of the install time.