cancel
Showing results for 
Search instead for 
Did you mean: 

Maintenance Activities Dependencies and Scheduling

Former Member
0 Kudos

Hi experts,

We currently have a requirement to create planned maintenance activities for a whole year.

The activities are as follow:

Activity 1: Execute on X date

Activity 2: Execute 2 weeks after Activity 1 has been finished

Activity 3: Execute 1 weeks after Activity 2 has been finished

Activity 4: Execute 5 weeks after Activity 3 has been finished

We wish to create a relationship dependency within these activities, but we're not sure how to do this. One scenario we were thinking was to make every activity a maintenance order, but we're not sure how to do the scheduling part for the orders to be created or released "X time" after the last order has been completed.

The other option was to create the activities as operations within an order, but again we're not sure how to manage these relationships and dependencies with operations. We're aware of the Relationships function, but we wish to schedule the activities taking into account the time intervals between the activities and re-scheduling when delays occur or when they are finished before the planned date.

Thanks and best regards,

Fernando Montenegro

Accepted Solutions (0)

Answers (1)

Answers (1)

Former Member
0 Kudos

Fernando Montenegro,

You could manage the same with both the options you had indicated.Basically you would use the OFFSET field to manage the delay between related activities.

Ideally you would manage this by creating each one of them as a separate operation within the work order. You could use the relationship tab to specify the dependencies between them along with the offset values.

For ex: On Operation 20 : Relationsip tab you would need to create a entry with "Op 10", Offset value of "2" with unit "Week", with relation ship type "FS" and with succesor indicator "selected".

Hope it helps.

Regards

Narasimhan

Former Member
0 Kudos

Hi Narasimnhan,

Thank you for your answer, however it only partially answers my question. How do we get the operations to re-schedule their dates once they have delayed or finished before the originial planned date? Will the relationship dependencies do this automatically?

For example:

Activity 2 is executed 3 weeks after Activity 1 has been finished because of a delay, this way Activity 3 must also re-schedule and move the date 1 week after Activity 2 has finished.

Thanks again,

Fernando

Former Member
0 Kudos

Fernando,

That depends on how you schedule and dispatch work(The tools that you use to manage this).The initial assignments on the order are basically planned dates and planned dependencies.There are different options available.Here are some options in standard.

If you are using the standard Operational list edit reports to schedule and assign work to crews through list edit print outs(You are potentially looking at current or next week work), then once you confirm operation 10 , either using CATS or IW41, and then schedule work on the work order using IW32, the dates will automatically be pushed out for the next operations.

If you use the standard capacity planning transactions to schedule and dispatch work then you would need to setup the profiles as appropriate to include rescheduling.If automatic scheduling is being performed then "finite scheduling" needs to be activated for the Work center and Strategy profile associated to the overall profile.Have a look at the [Sap Help|http://help.sap.com/erp2005_ehp_04/helpdata/en/04/55de88902142de84b5fca580b1bfac/frameset.htm] for detailed information associated to using this functionality. Confirmation of operations would automatically push out the dates for succeeding operations when capacity leveling is performed properly.

There also other tools available to support this process ex: MRS (Multi resource scheduler) from SAP, Click Scheduler from Click, GWOS(Graphical work order scheduler) from Prometheus group etc.All these require additional license and costs.

Regards

Narasimhan

former_member230000
Participant
0 Kudos

Hello Fernando.

Using standard SAP it will be difficult to see how the relationships behave in SAP. I will show you how I would approach it using the Graphical work order Scheduler.

In this example I have 1 Order with 3 operation. each operation has a relationship with an offset of one day.

[http://images.prometheusgroup.us/01_relationships.gif]

Let's that operation 20 is delayed for one day. In this case we would drag the operation to wednesday the operation turns yellow indicating a constraint. notice that the offsett to operation 30 is maintained as 1 day.

[http://images.prometheusgroup.us/02_relationships.gif]

Edited by: Tim Huang on Oct 7, 2010 11:27 PM