(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
Hi Everyone,
In my project i have some activities that can't be executed with delay, the second activity is modeled imediatly after first activity. For this reason I set "strict" on this activities.
After scheduling, the report below show me this infortmations.
Why this happened? Why this happened with this activies and others not happened?
Best Regards,
Daniel Morais
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Why Spider cannot figure it out if strict links are not mutually exclusive and there are feasible solutions.
Among many the following is a feasible solution. Just delay start of activity 3.
https://www.mediafire.com/file/1mc12f7fo3vxwte/Activities-22.003.sprj/file
https://www.mediafire.com/file/td9ac94dqhgorva/Activities-22.004.sprj/file
Do Monte Carlo know when not to use them and issue the warning? In some iterations there might be respected while in other they might not.
In the following figure strict deterministic lags are feasible but not optimistic or pesimistic, the probabilistic strict link contradict to other conditions.
Indeed
Even if they do not work for some cases, please do not eliminate them. They work for some strict sequence conditions, and they mut not be use without a "permanent medical assistance" :))
Bogdan Leonte is right - you must check if they were considered at each schedulling. Trere are also warnings reports about that, if they are not considered.
Imagine three activities with a hard and rigid logict hat cannot be separated from each other- they should be modelled as a planning package instead of a fragnet. There will be no need og strict link or ultra hard modification in programing algorithms. :)
They are indeed useful, you only need to know how and when to use them.
There are many cases when strict links contradict to other conditions and yes, Spider does not always respect strict links.
We introduced them because there were customer requirements and these customers were happy because they work properly in their projects. When we found that this link property does not work for some cases we decided to eliminate it. But when we had done this many customers requested to keep it despite the problems that appear in some cases. They know that sometimes strictness will not work but still they use them and in most cases it is helpful.
So we know about the problem with the strict links but keep this feature for our customers.
Hi Rafael,
Why is misleading ?
Daniel Morais
Hi Bogdan,
Perfectly understood , thank you very much.
Daniel Morais
The label Strict Links is misleading.
Hello Daniel,
When you have multiple successor for an activity you cannot have strict links. If you uncheck Use in scheduling property of link between 0108 and 4335 the strict link will be respected. For all other activities it must be a similar problem (I did not check them all).
Also you cannot have multiple successor with strict links.
Vladimir can better explain why the strict link is not respected if an activity has multiple successors.
Best regards,
Bogdan
Email: PPadmin@planningplanet.com
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