Accuracy in reporting time varies from company to company, but in most situations a report to the exact minute is neither necessary nor practical. Many companies find it advantageous to use a decimal system, which divides the hour into ten periods of six minutes each.
Under a decimal system, a job started at 9:23 am. and finished at 11:38 a.m. is reported as 9.4 and 1.6, With an elapsed time of 2.2 hours. The timekeeping task is simplified if all of a worker's time is related to a single job or is charged to a single process or department.