What complicates high$-$level processes versus mid$-$level or low$-$level processes related to supply chain analytics efforts?

a$)$ nothing, no difference $($no change$)$

b$)$ there are fewer items, so it goes faster $($speed to results$)$

c$)$ they may not be actioned directly $($it depends$)$

d$)$ senior leaders are defensive $($empire$-$building$)$