The main objective of this blog is to explain how scheduling parameters influence on the calculation of the plan date in preventive maintenance – time based single cycle plan.
Scheduling Indicator is the basis for calculating the planned dates:
Time : The calculation basis for the month is always 30 days; all calendar days are counted. Example: Cycle 1 month, start of cycle July 9th results in a plan date of August 8th.
Time Key date:The calculation basis is the effective days of a month.Ex:Cycle 1 month, start of cycle July 9th results in a plan date of August 9th.
Time-factory calendar is the basis for the month is always 30 days; only the factory calendar days are counted. Ex: Cycle 1 month, factory calendar Saturday/Sunday/public holiday free,start of cycle July 9th results in a plan date of August 22nd. Selecting factory calendar as German standard 01.
Call control parameter
Completion requirement: If you select the completion requirement check box then the system will generate subsequent orders once the previous order has been completed.It will give a pop-up message like one which is shown below.
It is used to create a preview of the pending maintenance dates. It gives the period of the preview in days,months, or years.For example if you want to have a preview for the entire 12 months for a maintenance plan set the scheduling period to 12 months. Below screen shots shows the scheduling period of a maintenance plan with a monthly cycle, a start date of July 9th and a scheduling period of 12 months.
Maintenance Plan with scheduling period
We use the call horizon to specify in percentage when an order should be created for a calculated maintenance date.The date as of which the order can be created is known as the maintenance call date. Following screen shots shows the behavior for a cycle plan of one month with 90%, 100% & 0% call horizon settings.
Above is the scheduling period with call horizon 90%
Above is the scheduling period with call horizon 100%
Above is the scheduling period with call horizon 0%
With 90% & 100 % settings, the scheduling list of the maintenance plan has the hold status.
In practice, If you want the call horizon to control the maintenance call directly, than set 0% for cycles which are shorter than one year and if cycles are longer than one year, set the call horizon to a high percentage value (>80%) to ensure that orders are not created too early and remain in the system too long.
I hope this blog will help & for any suggestions plz. feel free.
In part-II ,I am going to share on Data determination which includes shift factor, tolerance & cycle modification factor.