1. Critical Path Simulation
IWS/WebAdmin for z/OS
Critical Path Simulation
(former TWS for z/OS)

2. What is this presentation about?
This PowerPoint gives you a short overview about IWS/WebAdmin’s critical path simulation.
This button can be used to jump to specific slides in this presentation.
Start Simulation
Click on this symbol to jump to the overview slide

3. What is IWS/WebAdmin z/OS Simulation?
IWS/WebAdmin for z/OS provides forecast and critical path runtime simulation. This presentation shows examples of the basic functions:
Temporarily change, insert or delete dependencies and jobs in IWS/WebAdmin’s tables
Perform (mass) changes to the estimated durations
Save simulation scenarios for later reuse
Calculate the total duration of the critical path of all selected jobs
Shows the jobs on the critical path
In a list (table)
As netplan (flowchart)
As barchart

4. Table of Contents Start Simulation Critical Path Change Rule Modify
Changed Result
Time dependency
Bar chart
Forecast
Netplan

5. Simulation – Start
You can start Simulation from AD Modify or Query part
Specify search criteria and click simulation

6. Simulation – Start
Enter a name and description to save your simulation scenario (selection and modifications).

7. You can load and reuse your saved simulation scenarios later.
Simulation – Start
You can load and reuse your saved simulation scenarios later.

8. Simulation – Start
General information about the simulation (not jet started)
The selected applications and jobs
Click Simulate to start the calculation of planned start times and the critical path

9. Simulation - Options
Enter a default start time and check if time dependencies should be taken into account or not (input arrivals are always considered to build the external dependencies).

10. Simulation – Critical Path
The critical path has been calculated (45:02 min)
Operations on the critical path are marked

11. Simulation – Critical Path
If you scroll right, you can see estimated planned start and end times, which are calulated, based on the dependencies and estimated durations.

12. Simulation – Change Rule
You can define one or more change rules, e.g. add/subtract a percentage or set a specific duration
Here we add 10 percent to the duration of operations on WS=WAIT of applications TCP*
Here we add 10 percent to the duration of operations on WS=WAIT of applications TCP*
Click on “Ok” and then again on Simulate

13. Simulation – Change Rule
The higher durations result in a longer critical path (49:32 min)
The new “computed simulation durations”

14. Simulation – Netplan Maybe some dependencies should be changed
In the netplan, the operations on the critical path are marked red
You can insert, delete, modify applications and operations just for simulation

15. Click on Modify and you can change “everything” of an application
Simulation – Modify
Click on Modify and you can change “everything” of an application

16. Click on Operations and select an application to change dependencies
Simulation – Modify
Click on Operations and select an application to change dependencies

17. Change operation number from “060” to “050” to modify dependency
Simulation – Modify
Change operation number from “060” to “050” to modify dependency
060
050

18. Click on “+” to add new predecessors
Simulation – Modify
e.g. change or add external predecessor by using the application/operation picker.
e.g. change or add external predecessor by using the application/operation picker.
Click on “+” to add new predecessors

19. Simulation – Modify
The changed application will be stored in IWS/WebAdmin’s internal database with state “simulation”. You can keep that simulation version as long as you want and optionally you can take it over into IWS.

20. Simulation – Changed Result
The recalculated critical path is short now (38:32 min), even if the durations are still increased

21. Simulation – Changed Result
You can see which applications has been changed for simulation and which are unchanged (actual).

22. Simulation – Changed Result
In the new netplan, the operations of changed application are marked green and the new critical path is marked red (the blue one’s are identical to the current version in IWS).

23. Simulation – Time dependency
If there are time depending jobs, the calculation routing can optionally take care about it. The critical path may get longer (here 01:41:01 now).

24. Simulation – Time dependency
You can see which operations are time dependent and it´s start times

25. Simulation – Time dependency
The new critical path
Double click shows the details

26. Simulation – Bar chart
There is also a useful bar chart with timeline etc. Operations on the critical path are marked red

27. Forecast
Applications are maybe scheduled in different days. Enter a date and you will get only that applications, scheduled on that day (e.g. Thursday).

28. Some more jobs are scheduled on that day (e.g. Friday)
Forecast
Some more jobs are scheduled on that day (e.g. Friday)

29. And that results in a different critical path
Forecast
And that results in a different critical path

30. Simulation works also with lots of jobs and dependencies
Simulation – Netplan
Simulation works also with lots of jobs and dependencies

31. You can zoom in the netplan and follow the marked critical jobs
Simulation – Netplan
You can zoom in the netplan and follow the marked critical jobs

32. There is also a netplan and a list of the critical jobs only
Simulation – Netplan
There is also a netplan and a list of the critical jobs only

33. Simulation – Overview
IWS/WebAdmin’s forecast and critical path simulation enables you to:
Calculate the critical path of selected applicatons, scheduled for any day in the future
Try “what if” scenarios like
What if some dependencies are changed
Wha´t if new operations are inserted
What if all jobs A* are running 20 percent longer
...
Verify the critical path
In a list
In a netplan (flowchart)
In a bar chart
Planned enhancements:
Take the durations
of past run day
from another input file …

34. Thank you very much for your attention!