<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:10pt"><div><span>Hi,</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>I am struggling with the purpose of difficultyWeightFactoryClass in the @PlanningEntity annotation.</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><br></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>I thought it was used to indicate which PlanningEntities
to handle first in order to get faster to a solution.</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>Though it seems that it also has impact on whether or not to get to a zero-hardscore solution.</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>I mean I have a testcase that resolves to a zero-hardscore solution.</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>Then I change something small in how the </span><span>difficultyWeightFactoryClass calculates the weight and all the sudden I get a negative-hardscore solution.</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>I thought it would still get to the same zero-hardscore solution but in a shorter solving time.</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>My solver termination is as follows:</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> <termination><br>
<terminationCompositionStyle>OR</terminationCompositionStyle><br> <maximumSecondsSpend>3600</maximumSecondsSpend><br> <scoreAttained>0hard/0soft</scoreAttained><br> </termination></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><br></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;">and <span>constructionHeuristic</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> <constructionHeuristic><br> <constructionHeuristicType>BEST_FIT_DECREASING</constructionHeuristicType><br> </constructionHeuristic><br></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>I do not reach a zero-hardscore and the time spent is about 2.8 seconds...</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>If I read the best solution I get:</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>.isEveryProblemFactChangeProcessed(): true<br>.isTerminateEarly(): false<br><br></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>Any idea why I do not get a </span><span>zero-hardscore solution anymore when only making a small change to the </span><span>difficultyWeightFactoryClass logic?</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>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> </div><div>-----------------<br>http://www.codessentials.com - Your essential software, for free!<br>Follow us at http://twitter.com/#!/Codessentials</div></div></body></html>