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instantMRP will validate the data entered and the parameters specified, then ready the data for computation by opening the instantMRP Output form. Click on the COMPUTE button, then use the tools on the various tabs to display and manipulate the schedule that was created. If there are any errors during computation, then ERPlite will give a summary of the errors, which can be printed from the ERRORS tab of the Output form.


No Lot Sizing - the policy is Lot-for-lot i.e. the demand quantity is taken without applying lot sizes.

Fixed Lot Size - the fixed lot size is applied

Minimum Lot Size - the lot size is a minimum.  For example, if a requirement is less than the lot size, it will be increased to equal the lot size

Only a number in the range 0 to 11 is allowed.  It determines how Customer Orders for the part, Forecast Demand and Dependent Demand (when the part is used in a higher level part) are combined. Usually 0 is a safe value, the other values are for more advanced use.


MPS code 1 for example, results in  Sales Orders down-counting the forecast. Suppose SO1234 requires 10,000 PRD1000 in bucket 3 and the forecast is for 6,000 PRD-1000 in bucket 3. Then code 1 will result in  gross requirements for bucket 3 of  10,000, Whereas, code  0 would result in gross requirements of 16,000.



Abbreviations used below: CO for Customer Orders, FD for forecast Demand, DD for Dependent Demand.

max(A,B) means maximum of A and B, and always involves Forecast Demand.  Operations in brackets are done first.


Choose between:


0 means CO + FD + DD

1 means max(CO, FD) + DD

2 means max( (DD + CO), FD)   Note DD + CO done first, then the max value computed.

3 means max(DD, FD) + CO

4 means DD + CO (FD ignored if present)

5 means DD + FD (CO ignored if present)

6 means max(DD, FD) (CO ignored at present)

7 means CO + FD (DD ignored if present)

8 means max(CO, FD) (DD ignored if present)

9 means CO only

10 means FD only

11 means DD only.

instantMRP exports its planning calculations into two separate text files - one for work orders, and the other for purchase orders. This form is used to locate those text files and import the data into ERPlite. Follow the on-screen instructions to import the desired data into ERPlite. If any errors occur, you can review them by clicking on the SHOW LAST IMPORT ERRORS button.  You can make changes in the temporary table before creating the WOs and POs.


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