Tracking ID for different event handlers set

Question

In the following link i send the file with the image purpose:
http://www.sendspace.com/file/cxbd8l
Dear experts,
We need to give Visibility for the next process, conformed by three visibility process, show more detailed in the following explanation:
1. First Visibility process -> purchasing scenario
     Purchase Order -> Confirmation -> Goods Receipt -> Invoice Verification
Note: In this scenario we need to modify the rule set (don´t include inbound delivery) and modify the standard functions (Create Z), of expected events and Goods receipt.
2. Second Visibility process -> Stock transport order Scenario
Stock transport order (PO) -> Outbound Delivery -> Shipment -> Goods receipt -> Invoice Verification (Planned delivery costs).
Note: In this scenario we need to create a Z function to planned delivery costs and create the Z events according to the Planned delivery costs we want to control.
3. Third Visibility process -> Second Stock transport order scenario
Stock transport order (PO) -> Outbound Delivery -> Goods receipt -> Invoice Verification (Planned delivery costs).
Note: In this scenario we need to create a Z function to planned delivery costs and create the Z events according to the Planned delivery costs we want to control.
After this introduction, the question is how we can see an entire operation (the combination of the three scenarios), I mean, when we ingress to /SAPTRX/EH_LIST transaction, and execute this, the transaction show an event handler level (Same way /SAPTRX/EH_SET, event handler set level), but my grouping fields are according to Event handler (example: Bussines process type), but we don´t have a u201CProcess Unique IDu201D, that combine the different Application Object Types involved (In this process, PCM10_ITEM, TRA10_DELIV, TRA10_ROAD).
In the following image I show an example of the point exposed (think in /SAPTRX/EH_LIST transaction):
Appl.Obj.type             PROCESS UNIQUE ID
PCM10_ITEM                123456
TRA10_DELIV              123456
TRA10_ROAD              123456
Ok for do this; we expect to follow the next steps:
1.     Define a field in the Tracking documents (Purchase order, Stock transport order, shipment and outbound delivery), where we ingress the same value (Process value ID) at the moment of execute the indicated transaction:
a.     ME21N -> PO and stock transport order.
b.     VT01N -> Shipment.
c.     VL01N -> Outbound delivery.
2.     Define a new Info Parameter both in the application system and in event management system.
3.     Create Z function for expected event extractors and Info parameter Extractors (These functions have to look and save the info parameter defined previously).
4.     Because this field doesn´t exist in any report, we think to create an enhancement in the /SAPTRX/EH_LIST transaction with the objective of don´t create a new report for only one new field (It require an ABAP program).
According with this explanation, it´s correct our analysis? We forget any step to get our purpose?
We appreciate a lot your help in this issue.

Answer 1

Hello,
Kevin thanks a lot by your answer, the question is how to associate three event handlers, but i don´t know about the number range, i appreciate a lot if you can explain to me more detailed, how i can define this number range and what tables has associated in order to define de Function module for "Control parameter extractor". I appreciate too if you can explain me how the system assign the same number in the three event handlers.
According to this, I appreciate a lot if you confirm  to me, the followings steps that cover this requirement (I propose two different scenarios, the second scenario was adjusted after your explanation):
SCENARIO 1 -> Using a custom number range.
1. Define a custom number range.
2. Define a new Control Parameter both in the application system and in event management system. Assign the control parameter to the list and create the event handler set.
3. Create Z function for "expected event extractors" and "Control parameter Extractors" (These functions have to look and save the control parameter defined previously).
4. In this case, cause its defined a common event handler set, we can execute the /SAPTRX/EH_SET transaction and look the operation consolidated.
SCENARIO 2 -> Including information in one additional field in the ECC transactional documents
1.     Define a field in the Tracking documents (Purchase order, Stock transport order, shipment and outbound delivery), where we ingress the same value (Control parameter) at the moment of execute the indicated transaction:
a.     ME21N -> PO and stock transport order.
b.     VT01N -> Shipment.
c.     VL01N -> Outbound delivery.
2. Define a new Control Parameter both in the application system and in event management system. Assign the control parameter to the list and create the event handler set (with relation type -> 2 control parameter).
3. Create Z function for "expected event extractors" and "Control parameter Extractors" (These functions have to look and save the control parameter defined previously, in this case according with the extractor (PCM10_ITEM or TRA10_ROAD), the function has to find in the respective field in any case (it means in the PO its the field XXX in the shipment its the field YYY, but in event management the "control parameter" its the same).
4. In this case, cause its defined a common event handler set, we can execute the /SAPTRX/EH_SET transaction and look the operation consolidated.
According with this explanation, it´s correct my analysis? I forget any step to get our purpose?
I appreciate a lot again your help in this issue.