https://communities.sas.com/t5/Mathematical-Optimization/Please-help-Optimizing-strategy/m-p/42061#M349 The optimal solution for this depends on how important the two objectives are for you.<BR /> <BR /> If they are equally important, my guess is that the optimal solution is trivial:<BR /> <BR /> "Study all the chapters in some order, then repeat the same order twice."<BR /> <BR /> Thinking about it, maybe the order in each iteration does not even matter, depending on how we count "Revise chapter earlier". Some options would be: Sum, Arithmetic mean, median of days between chapter revisions. <BR /> <BR /> One could write a MIP model with OPTMODEL, I guess. The constraints are no problem, but the objectives are a little messy, depending on what option above we choose. Fri, 09 Jul 2010 12:38:11 GMT Philipp_SAS 2010-07-09T12:38:11Z https://communities.sas.com/t5/Mathematical-Optimization/Please-help-Optimizing-strategy/m-p/42060#M348 Hi everyone,<BR /> It is an unusual question, I dont know if this is the right forum.<BR /> <BR /> I need to study 16 chapers, one chapter a day. My strategy is to revise 3 times. Hence I have 48 days.<BR /> <BR /> How can I optimize my schedule to achieve following:<BR /> <BR /> 1&gt; Revise a chapter sooner to retain more<BR /> 2&gt; Complete the entire 16 chapters the first time as fast as possible<BR /> <BR /> I appreciate all your help.<BR /> <BR /> Regards,<BR /> <BR /> Amit Tue, 29 Jun 2010 18:04:06 GMT https://communities.sas.com/t5/Mathematical-Optimization/Please-help-Optimizing-strategy/m-p/42060#M348 AmitKB 2010-06-29T18:04:06Z https://communities.sas.com/t5/Mathematical-Optimization/Please-help-Optimizing-strategy/m-p/42061#M349 The optimal solution for this depends on how important the two objectives are for you.<BR /> <BR /> If they are equally important, my guess is that the optimal solution is trivial:<BR /> <BR /> "Study all the chapters in some order, then repeat the same order twice."<BR /> <BR /> Thinking about it, maybe the order in each iteration does not even matter, depending on how we count "Revise chapter earlier". Some options would be: Sum, Arithmetic mean, median of days between chapter revisions. <BR /> <BR /> One could write a MIP model with OPTMODEL, I guess. The constraints are no problem, but the objectives are a little messy, depending on what option above we choose. Fri, 09 Jul 2010 12:38:11 GMT https://communities.sas.com/t5/Mathematical-Optimization/Please-help-Optimizing-strategy/m-p/42061#M349 Philipp_SAS 2010-07-09T12:38:11Z