Hi Cedric,

Thanks for your comment.
How should I model this schedule object? I mean, at which point do I put a 'assignment' in the list?
Should I do this within a rule?
Could you elaborate a bit on this solution?

Thanks!

Michiel

 
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From: Cedric Hurst <cedric@spantree.net>
To: Michiel Vermandel <mvermand@yahoo.com>; Rules Users List <rules-users@lists.jboss.org>
Sent: Tuesday, December 4, 2012 11:22 PM
Subject: Re: [rules-users] How to ensure that a person does not execute the same task twice in a row?

I believe you'll probably to create a schedule object that keeps track of all assignments.  From there , we can create a rule to assign a negative constraint penalty to any schedules with two adjacent assignments for the same person with the same task.  

Sent from my iPhone

On Dec 4, 2012, at 10:40 AM, Michiel Vermandel <mvermand@yahoo.com> wrote:

Hi,

In my usecase I need to plan tasks (PlanningEntity).
I have two kinds of tasks (for example CleaningTask and InspectionTask (inspect that cleaning was OK)).
Each task needs to be assigned to a person and a period.
Person and period both are PlanningVariables.

I need to ensure that a person does not execute an InspectionTask twice in a row.
How can I find out what the previous task is that is assigned to a person?
It is not guaranteed that the person had a task in the previous period (period-1).
 
Thanks,

Michiel
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