$5.$ In identifying effective metrics, they should primarily flow down from which of the following?

a$.$ Voice of the Customer $($VOC$)($to meet or exceed customer requirements$)$

b$.$ Voice of the Business $($VOB$)($to run the business effectively$)$

c$.$ Employee suggestion box

d$.$ None of the Above

e$.$ Either $($a$),($b$),$ or both $($a$)$ and $($b$)$