The Just$-$in$-$Time $($JIT$)$ concept is a manufacturing workflow method. It$$s used to reduce flow times and costs within production systems and the distribution of materials in manufacturing organisations. However, it$$s not just limited to these benefits. $(25)$

a$.$ Why has the JIT approach to inventory control become popular in some industries?

b$.$ Should JIT be adopted by all inventory managers? Why or why not? Discuss your view with the use of relevant research.