Mixed Model Map Calculations
The mixed model map enables you to design and monitor each part of the line design process. The mixed model map bases calculations on the date range entered in the Mixed Model Map window if this date range falls within the forecast date range. Otherwise the forecast date range will be used.
(Mixed Model Map Calculations Formula Key)
Line TAKT Time:
Line TAKT time is calculated as follows:
Process Volume:
Process volume is calculated as follows:
Note: Process volumes are calculated for line operations as well as processes. A process volume is calculated for a product and a process (or line operation). If the reverse cumulative yield is 0, the system will assume it is 1.
TAKT Time:
The TAKT time is calculated as follows:
Note: TAKT time is calculated for a process or line operation, unlike the line TAKT time which is calculated for the entire line.
Machine Weighted Time:
Machine weighted time is calculated as follows:
Labor Weighted Time:
Labor weighted time is calculated as follows:
Elapsed Weighted Time:
Elapsed weighted time is calculated as follows:
Note: Machine, labor, and elapsed weighted times are calculated by process (or line operation). For example, if your mixed model map displays five processes, then the mixed model map will calculate five machine weighted times, one for each process.
Machines Needed:
Machines needed is calculated as follows:
Note: The mixed model map calculates the number of machines needed by process (or line operation). Therefore, in this formula, MWT represents the machine weighted time for a process (or line operation). And, TAKT represents the TAKT time for a process (or line operation).
Labor Needed:
Labor needed is calculated as follows:
Note: The mixed model map calculates labor needed by process (or line operation). Therefore, in this formula, labor weighted time represents the LWT for a process (or line operation). And, TAKT represents the TAKT time for a process (or line operation).
In Process Kanbans (IPKs) Needed:
IPKs Needed is calculated as follows:
Note: The mixed model map calculates the number of IPKs needed by process (or line operation).
IPKs Needed by Machine
IPK's needed by machine is calculated as follows:
Mixed Model Map Calculations Formula Key
D = Total demand
B = Boost percent in decimal form (Entered in mixed model map)
H = Hours/day (Entered in mixed model map)
# of Days = Number of demand days (Entered in the mixed model map)
TC = Time conversion factor
You can select the time unit of measure (UOM) in the mixed model map.
- TC = 1 if time UOM = Hour
- TC = 60 if time UOM = Minute
- TC = 3600 if time UOM = Second
TM = Machine time for a product and process (or line operation) combination
TL = Labor time for a product and process (or line operation) combination
TE = Elapsed time for a product and process (or line operation) combination
Note: Machine, labor and elapsed times are calculated in the flow routing form.
AVG = A function meaning "take the average of..."
PlnNET = Net planning percent in decimal form
Note: Net planning percent is calculated in the flow routing form.
CYREV = Reverse cumulative yield
Note: Reverse cumulative yield is calculated in the flow routing form.
M = The number of machines used at a particular process or line operation
For example, this means, for a given process, take the sum of the process volume over all products displayed in the mixed model map.
