1 Let rj = regular production quantity for period j, oj = overtime production quantity in period j, ii = inventory quantity in period j, and di = demand quantity in period j. Correct formulation of the demand constraint for a multi-period scheduling problem is:
a. rj + oj + i2 - i1? di
b. rj - oj - i1 + i2 ? di
c. rj + oj + i1 - i2 ?2 di
d. rj + oj +i1 - i2 ? di
e. rj + oj + i2 - i1 ? di
2 What's the differences and similarites between Toyota and GM in operation management? (say sth. about supply chain, facility and lean production)