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    Hello,<br>
    <br>
    I'm not a good Drools user. But i think what you can do, is to use a
    high value(a value that is greater than the sum of all other
    possible values associated with the soft constraints). By this way
    you will be sure that a solution with this constraint violated will
    not be accepted if there is another one&nbsp; in which the constraint is
    not violated. In opposite if all your solutions violate this
    constraint, you will have one with the less number of violation and
    that can be enhanced through the steps of research, which can lead
    finally to a feasible solution.<br>
    <br>
    Good luck, any way.<br>
    <br>
    Le 26/10/2012 15:03, Michiel Vermandel a &eacute;crit&nbsp;:
    <blockquote
      cite="mid:1351256610.35899.YahooMailNeo@web161302.mail.bf1.yahoo.com"
      type="cite">
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        255); font-family: tahoma,new york,times,serif; font-size:
        10pt;">Hi,<br>
        <br>
        Any one an idea?<br>
        <div><br>
          <span></span></div>
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          font-family: tahoma,new york,times,serif; background-color:
          transparent; font-style: normal;"><span>Thanks</span></div>
        <div>&nbsp;</div>
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            <div dir="ltr"> <font face="Arial" size="2">
                <hr size="1"> <b><span style="font-weight: bold;">From:</span></b>
                Michiel Vermandel <a class="moz-txt-link-rfc2396E" href="mailto:mvermand@yahoo.com">&lt;mvermand@yahoo.com&gt;</a><br>
                <b><span style="font-weight: bold;">To:</span></b> Rules
                lists.jboss.org <a class="moz-txt-link-rfc2396E" href="mailto:rules-users@lists.jboss.org">&lt;rules-users@lists.jboss.org&gt;</a> <br>
                <b><span style="font-weight: bold;">Sent:</span></b>
                Thursday, October 25, 2012 10:27 AM<br>
                <b><span style="font-weight: bold;">Subject:</span></b>
                [rules-users] Drools planner: unbreakable constraint
                question<br>
              </font> </div>
            <br>
            <div id="yiv1711374790">
              <div>
                <div style="color: rgb(0, 0, 0); background-color:
                  rgb(255, 255, 255); font-family: tahoma,new
                  york,times,serif; font-size: 10pt;">Hi,<br>
                  <br>
                  I have a planning project that is determined by quite
                  some constraints.<br>
                  Translated in rules this results in a number of hard
                  constraints and a number of soft constraints.<br>
                  Now I have one rule (hard constraint) that simply many
                  not be broken, never, ever.<br>
                  If a planning that fails this rule would be executed,
                  we face a lawsuit.<br>
                  <br>
                  Of course I can (and will) do a post-evaluation to
                  find out if this rule is broken, <br>
                  but I want to know if there is a possibility in drools
                  planner to forcefully reject any "solution" that
                  breaks this one rule, <br>
                  continue searching for other solutions and guarantee
                  that the "best solution" will not propose a
                  combination that fails this rule?<br>
                  <br>
                  Is this possible?<br>
                  <div><br>
                    <span></span></div>
                  <div style="color: rgb(0, 0, 0); font-size: 13.3333px;
                    font-family: tahoma,new york,times,serif;
                    background-color: transparent; font-style: normal;"><span>Thanks,</span></div>
                  <div style="color: rgb(0, 0, 0); font-size: 13.3333px;
                    font-family: tahoma,new york,times,serif;
                    background-color: transparent; font-style: normal;"><br>
                    <span></span></div>
                  <div style="color: rgb(0, 0, 0); font-size: 13.3333px;
                    font-family: tahoma,new york,times,serif;
                    background-color: transparent; font-style: normal;"><span>Michiel<br>
                    </span></div>
                  <div>&nbsp;</div>
                  <div>-----------------<br>
                    <a class="moz-txt-link-freetext" href="http://www.codessentials.com">http://www.codessentials.com</a> - Your essential
                    software, for free!<br>
                    Follow us at <a class="moz-txt-link-freetext" href="http://twitter.com/#!/Codessentials">http://twitter.com/#!/Codessentials</a></div>
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