Loop on subprocess

Hello guys,
I came across a BPM use case on SDN and applied some thought on it and these questions are my results
This is a BPM process to process time sheets of external employees. And, the concept looked simple to be at the beginning, but when I start planning....
1. Process should be a automated process, say a schedule job which triggers the process
2. The triggered process should get the reporting managers of external employee working for the organization. (many to many relation). Can we make use of decision table in this scenario, where the HR or some person would update the excel?
3, Assuming that emails are sent to the respective employees with the link to adobe form, and the employees duly fills the offline forma and would reply back with the attachment, would the system be able to delegate the reply to corresponding managers? I remember reading on help that one process can respond to one email only.
4. Is it possible to create multiple instances of a sub process and main process would loop on the sub-process waiting for the completion of all sub processes?
This looks like a way too complex for a beginner to me... I really need some inputs from the experts... Please do help.
Thanks and regards,
Chinnu

1. Process should be a automated process, say a schedule job which triggers the process
This is possible. BPM Process can be triggered through a Web Service. Use a scheduled job to start the process.
[http://help.sap.com/saphelp_nwce10/Helpdata/EN/44/2da75e13363f0ae10000000a114a6b/content.htm]
2. The triggered process should get the reporting managers of external employee working for the organization. (many to many relation). Can we make use of decision table in this scenario, where the HR or some person would update the excel?
Yes, we can use decision table for this purpose.
3, Assuming that emails are sent to the respective employees with the link to adobe form, and the employees duly fills the offline forma and would reply back with the attachment, would the system be able to delegate the reply to corresponding managers? I remember reading on help that one process can respond to one email only.
Adobe Forms can be integrated using WebDynpro Java. Once user uploads the completed adobe form , WebDynpro can read the data from Form and update the process using BPM API (available from NW 7.3).
[http://help.sap.com/saphelp_nw73/helpdata/en/24/6a325944854629adcfd73c2cc0fa60/content.htm]
4. Is it possible to create multiple instances of a sub process and main process would loop on the sub-process waiting for the completion of all sub processes?
Yes, it should be possible

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I'm writting a multithreaded application in which I'll
be starting multiple instances of "AppStartThread"
class (given below). If I start only one instance of
"AppStartThread", it is working fine. But if I start
more than one instance of "AppStartThread", one of the
threads hangs after some time (occasionaly). But other
threads are working fine.
I have the following questions:
1. Is there any problem with starting a Thread inside
another thread?. Here I'm executing the process in a
while loop.Of course this is OK, as your code is always being run by one thread or another. And no, it doesn't depend on which thread is starting threads.
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after completing the process ("java ExecuteProcess").
But the P.waitFor() is not coming out.This is a vital clue. Is the process started by the Runtime.exec() actually completing or does the ps command still show that it is running?
3. Is it bcoz of the same problem as given in Bug ID :
4098442 ?.
4. Also java 1.2.2 documentation says:
"Because some native platforms only provide limited
ed buffer size for standard input and output streams,
failure to promptly write the input stream or read the
output stream of the subprocess may cause the
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