In Whiteboard cycles represent the time it takes for a machine/line to produce one unit of a product. For example, if a machine is bottling some soda, how long does for the machine to produce one bottle. Cycles is not the same as the number of parts that were made. In a given cycle a machine could make eight parts but it only took one cycle. Cycle calculations come in many forms each representing a variation in the cycle calculations.
Many cycle calculation in whiteboard will show the actual, expected and the variance between these two calculations.
Before Listing the calculations, here is a description of few the variable used for this calculation
Uptime - the amount of time the machine actually was up
Scheduled - the amount of time the machine was expected to be up
Total - the amount of parts that were actually made
Expected - the amount of parts that were expected to be made
Cycles - the amount of cycles that actually occurred
Expected Cycles - the amount of cycles that were expected
Cycle Time [seconds per cycle]
Actual Cycle Time = Uptime [seconds] / Cycles
Expected Cycle Time = Scheduled [seconds] / Expected Cycles
Cycle Time Gauge = Actual Cycle Time - Expected Cycle Time
Strikes Per Hour (SPH) [cycles per hour]
Actual SPH = Cycles / Uptime [hours]
Expected SPH = Expected Cycles / Scheduled [hours]
SPH Gauge = Actual SPH - Expected SPH
Strikes Per Minute (SPM) [cycles per minute]
Actual SPM = Cycles / Uptime [minutes]
Expected SPM = Expected Cycles / Scheduled [minutes]
SPM Gauge = Actual SPM - Expected SPM
Part Cycle Time (PCT) [seconds per part]
Actual PCT = Uptime [seconds] / Total
Expected PCT = Scheduled [seconds ] / Expected
PCT Gauge = Actual PCT - Expected PCT
Parts Per Hour (PPH) [parts per hour]
Actual PPH = Total / Uptime [hours]
Expected PPH = Expected / Scheduled [hours]
PPH Gauge = Actual PPH - Expected PPH
Parts Per Minute (PPM) [parts per minute]
Actual PPM = Total / Uptime [minutes]
Expected PPM = Expected / Scheduled [minutes]
PPM Gauge = Actual PPM - Expected PPM