How to Interpret Cycle Calculations

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 is 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

• expectedCycles - the amount of cycles that were expected

Below are listed a few calculations:

SPH (Strikes Per Hour)

1. actual = uptime/cycles

2. expected = scheduled/expectedCycles

3. actual - expected

SPM (Strikes Per Minute)

1. actual = total/uptime

2. expected = scheduled/expectedCycles

3. actual - expected

PPH (Parts Per Hour)

1. actual = total/uptime

2. expected = expected/scheduled

3. actual - expected

PPM (Parts Per Minute)

1. actual = total/uptime

2. expected = expected/scheduled

3. actual - expected

PCT (Parts Cycle Time)

1. actual = uptime/total

2. expected = scheduled/expectedCycles

3. actual - expected

CPM (Cycles Per Minute)

1. actual = cycles/uptime

2. expected = expectedCycles/scheduled

3. actual - expected

CPH (Cycles Per Hour)

1. actual = cycles/uptime

2. expected = expectedCycles/scheduled

3. actual - expected