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1
Define the First and Last Process Step
The first step is to define where the first and last steps of a process run take place. For example, in order picking, the start is often an area with empty pallets and the end is the shipping area.
2
Determine the Actual Time Between End and Start
The time between the end of the previous run and the start of the next run is the time between two process runs. This can be determined in different ways.
A
Motion-Mining®
In Motion-Mining® projects, time can be determined in regions. This allows the average time in the start and end regions to be determined.
B
Process Observation and Time Recording
In a process observation, the frequency can be recorded using a tally sheet or app.
3
Determine the Frequency
It is also necessary to determine how often the time between two runs occurs. To do this, it is necessary to determine how many runs of a process are performed on average by a person per day.
A
Motion-Mining®
Within Motion-Mining®, processes can be defined and the average throughput time per process can be determined. The working time per day results in the average number of runs per person per day.
B
Process Observation and Time Recording
In a process observation, the frequency can be recorded using a tally sheet or app.
C
WMS Data Analysis
The number of runs is usually the same as the number of orders in the WMS. Consequently, the number of runs can be determined from the WMS via the number of orders per person per day.
4
Determine the Target Time
Depending on the actual time recorded, the corresponding target time must be determined.
A
Process Observation and Time Recording
For process monitoring, a stopwatch or app can be used to record the optimum time between two process changes.
B
MTM Process Modelling
The MTM lists contain values for different activities. In this way, the optimum time for activities between two runs can be determined.
C
Measure the Layout
If there is a distance to be covered between the end of one run and the start of the next, the time required can be determined from the layout. The average distance can be read from the layout and multiplied by the speed of the vehicle/person (see MTM).
5
RoI Calculation
To calculate the RoI, the frequency must be multiplied by the difference between actual and target time and then scaled to the total number of employees and working days. This is set against the cost of the measure.
