D$.,e-d-f-g$

E$.$ f$-$e$-$d$-$g

$31.$ Scheduling in service systems often takes the form of:

$($I$)$ appointment systems.

$($II$)$ reservation systems.

$($III$)$ makespan systems.

A$.$ Ionly

B$.$ II only

C$.$ I and II only

D$.$ III only

E$.$ I, II$,$ and III

$32.$ Scheduling in service systems may involve scheduling:

$($I$)$ the workforce.

$($II$)$ the equipment.

$($III$)$ customers.

A$.$ II only

B$.$ I and II only

C$.$ II and III only

D$.$ I and III only

E$.$ I, II$,$ and III

$33.$ Primary considerations in scheduling high$-$volume systems involve:

$($I$)$ coordinating the flow of inputs.

$($II$)$ overcoming the disruptions to planned outputs.

$($III$)$ assigning workers to work centers.

A$.$ I and III

B$.$ I and II

C$.$ II and III

D$.$ I, II$,$ and III

E$.,11$ only

$34.$ Organizations with fixed, perishable capacity can benefit from:

A$.$ yield management.

B$.$ price increases.

C$.$ constraints.

D$.$ suboptimization.

E$.$ waiting lines.