To reduce waiting times by actively managing system constraints, managers could consider: (I) using temporary workers. (II) shifting demand from high-demand periods to low-demand periods. (III) offering more service variety. (IV) discovering bottlenecks.

(I) using temporary workers.

(II) shifting demand from high-demand periods to low-demand periods

(IV) discovering bottlenecks.

Explanation:

For reducing the waiting lines manager should be considered by using the temporary workers that help the company for any loss now if the demand is shifted from high to low it helps to manage the service level and for establishing the bottlenecks the problem is also solved

Therefore the first second and fourth part is chosen

answer; conceptual skills;

answer; false pretense;