-For the first work centre I set resource requirement to "Require here, but do not release the Resource"
-For the last work centre I set resource requirement to "Only release the Resource here"
-For work centres in between I left the requirements as Normal.
The problem is that the resources gets stuck in a queue between first and second work centres, the new work items are keep arriving but nothing else happens
What I did wrong? How to fix it?
If you remove the resource requirement for all activities apart from the first and the last one (and leave the "Require here..." and "Only release here.." as you currently have it), then the simulation will run as you want it.
I hope this helps.