It is week 35 of a busy year at Ashby Architects and Jo Ashby is facing a big problem. Both her two junior partners have been diagnosed with a serious illness contracted on a trip to scope out a prospective job in Lichenstein. So jo has to step in and complete the outstanding jobs that were being worked on by two juniors. The outstanding jobs are shown in table 10.7.

Jo has heard that a sequencing rule called the critical ratio (CR) will give efficient results. The priority of jobs using the CR rule is defined by an index computed as follow:

CR = time remaining/workdays remaining = (due date - todays date) / workdays remaining

Outstandnig jiobs that jop needs to complete:

Job	Due Date (work)	Weeks of work remaining
Ashthorpe lavatory block	40	2.0
Bubgwitch bus shelter	48	5.0
Crudstone plc HQ	51	3.0
Dredge sewage works	52	8.0