Related Articles 1. Write down the time when production begins. 2. Record the time at the end of the day when production ends. 3. Use the starting time and ending time to add up the total number of production hours for the day. 4. Count the number of units that were produced during the day if you The Production Rate Calculator computes the length, area, volume or generic units that can be processed, produced or consumed over a period of time base on a constant rate. It also computes the amount of time needed to process, produce or consume a total length, area, volume or number of generic unit based on a total number and a constant rate. The production time for a manufacturing process is primarily determined from the cycle time, but must also account for the defect rate, machine uptime, and machines used. Using these parameters, the run quantity, run time, down time, total production time, and production rate (parts/hr) will be calculated.