PS basics

[Former Member]

Hello SAP PS experts!

I have beeb given to analyse the process Management of PS system....

I am New to SAP PS system.

Please can someone throw some light on the same.

I have a Little Idea ...Please confirm...

We create

1. Process Defination

2. WBS elements

3. Networks and

4. Activities

As the Master Data

Then How does the scheduling happens.

How the Sales Order is assigned a WBS elements and also how is the Procurement PR & SR generated automatically from the CJ20n when we define the materials under the components.

Thanks for your help.

regards,

A S

[Former Member · Accepted solution]

Hi,

Networks and network activities are more suitable for planning resources and scheduling than WBS's and WBS elements.

For Networks,Scheduling calculates the earliest and latest dates for the execution of the activities, and the capacity requirements and floats

Scheduling types include:

1.Forward scheduling: scheduling starting from the start date

2.Backward scheduling: scheduling starting from the finish date

3.Scheduling to current date: scheduling starting from the current date

4. "Today" scheduling: a scheduling type for rescheduling an order if the start date is in the past

You need to define scheduling parameters in Customizing.

Check path

SPRO->Project System->Dates->Scheduling->Specify parameters for Network Scheduling

Secondly, WBS can be assigned as Account Assignment in Sales order.Check Account assignment tab of sales order.

Thirdly about procurement,

When procuring services externally (outsourcing), you can create services or externally-processed activities.

Example: You commission a freelance engineer to design and build a machine.

When you create such an activity, a purchase requisition is also created, and processed further in Purchasing. You can access data from Purchasing for external processing (a purchasing info record, for example, which contains prices and delivery times for external processing).

Externally-processed activities give rise to planned costs equivalent to the prices from the purchasing info record or the price in the activity. The valuation variant for the network costing variant determines which price is used for the valuation. When the purchase requisition is activated and converted to a purchase order, the activity is also shown as a purchase requisition commitment or purchase order commitment.

The account assignment category in the purchase order determines whether the goods/invoice receipt is valued - that is, whether it gives rise to actual costs. If the goods receipt is valuated, actual costs are posted to the activity and the commitment is reduced by the amount of the purchase order. This means that the invoice receipt may correct the actual costs.

Service activities are maintained for the purchase of services.Creating such an activity establishes the link to MM Services (MM-SRV). Unlike externally-processed activities, service activities contain a service specification containing planned activities and value limits for unplanned activities.This service specification is copied to the purchase order where Purchasing can then modify it. Service activities also give rise to planned costs or purchase requisition/order commitments. Instead of goods receipts, services are later entered and accepted.

Regards

Tushar

[Former Member]

Scheduling:

U defien duration and relationship for activities. When project is scheduled system will do forward & backward scheduling and Earliest and Latest dates are calculated. Depending on the setting Start date is taken from Network or WBS for scheduling.

Sales Order:

In Sales Order Item details, Account Assignment tab WBS is assigned.

Procurement:

When the mat is attached to activity, depending on the selection system wil generate Reservation or PR.

When Service activity is created in the Project system will create Service PR.

You can download PDF files from below link for detailed info about each functionality.

http://www.sapprojectsystem.com/2008/05/03/sap-ps-documentation/