Which of the following statements is NOT true regarding aggregate $?$ ?plans?

Part $2$

A $.$

Aggregate plans use information regarding individual products rather than product lines.

B $.$

An aggregate plan often examines a $?3-$ ?to $?18-$ month time horizon.

C $.$

An aggregate plan is the output of $?$ ?S&OP $.$

D $.$

For service $?$ ?organizations, an aggregate schedule ties strategic goals to workforce schedules.