ATTENTION

This FlexSim Community Forum is read-only. Please post any new questions, ideas, or discussions to our new community (we call it Answers) at https://answers.flexsim.com/. Our new Question & Answer site brings a modern, mobile-friendly interface and more focus on getting answers quickly. There are a few differences between how our new Q&A community works vs. a classic, threaded-conversation-style forum like the one below, so be sure to read our Answers Best Practices.


flexsim.com

Go Back   FlexSim Community Forum > FlexSim Software > Q&A
FAQ Downloads Calendar Search Mark Forums Read

Q&A Using Flexsim and building models

Reply
 
Thread Tools Display Modes
  #1  
Old 05-05-2009
Markus Bans Markus Bans is offline
Flexsim User
 
Join Date: Aug 2007
Location: D-41199 Moenchengladbach, Germany
Posts: 8
Downloads: 28
Uploads: 1
Thanks: 2
Thanked 15 Times in 4 Posts
Rep Power: 0
Markus Bans will become famous soon enough
Default Scheduled_down and Waiting_for_operator states

Hi there,

in the attached model, the source, Operator1 and both Processor1 and Processor2 belong to a 7 days and 8 hours timetable.

So I expect 66.7 % for the state 'Scheduled_down'.

This is the case for Processor2 and for Operator1, but not for Processor1.

Processor1 shows a lower percentage for 'Scheduled_down' than 66.7 % and also a high percentage for 'Waiting_for_Operator'.

But how can an object wait for an operator, when it's scheduled down?

So why is the percentage of Processor1 for 'Scheduled_down' lower than 66.7 %?

Please run the model fast until time = 604800 s, what is exactly 7 days.

Kind regards,

Markus Bans
Attached Files
File Type: zip Operator_and_processor_states.zip (42.2 KB, 280 views)
Reply With Quote
  #2  
Old 05-05-2009
Phil BoBo's Avatar
Phil BoBo Phil BoBo is offline
Flexsim Development
 
Join Date: Jan 2008
Posts: 756
Downloads: 109
Uploads: 18
Thanks: 385
Thanked 1,483 Times in 525 Posts
Rep Power: 1169
Phil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond reputePhil BoBo has a reputation beyond repute
Default

It is because of the order of the stopobject() calls.

When you call stopobject() on an operator who is being utilized by a processor, that operator then in turn calls stopobject() on the processor to make it waiting_for_operator.

So what is happening is that you are stopping the processor, then stopping the operator, which in turn stops the processor again, so the processor is in waiting_for_operator state during its down time.

To fix this you could reorder the members of the time table, but this isn't really a good solution.

The better solution is to increase the priority on the stop request for the time table. In the time table's Down Function, change the priority value from 0 to 1. This way, when the operator calls stopobject() on the processor, that stop request's priority is 0, but the scheduled_down stop that it is currently in has a priority of 1 so it stays in the scheduled_down state.
Reply With Quote
The Following 7 Users Say Thank You to Phil BoBo For This Useful Post:
Carsten Seehafer (05-06-2009), Jörg Vogel (05-06-2009), Markus Bans (05-05-2009), rahulnaveenaggarwal (06-27-2012), RalfGruber (05-06-2009), Stefan Trabut (05-05-2011), Tom David (05-05-2009)
Reply

Tags
scheduled_down, states, timetable

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Creating a stacked bar chart for the states of multiple objects Kris Geisberger Tips and Tricks 6 08-11-2011 09:40 PM
Multiprocessor states and MTBF Markus Bans Q&A 1 03-30-2009 01:34 AM
Flow items with states AlanZhang Q&A 16 11-30-2007 10:32 AM


All times are GMT -6. The time now is 08:01 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1993-2018 FlexSim Software Products, Inc.