$($i$)$State the steps that are followed in installing a point$-$system of a job evaluation plan.

$($ii$)$State the reasons for installing a wage incentive plan in a company. What are the reasons for wage incentive plan failures?

$($iii$)$Explain the characteristics of the following direct financial plans: $($a$)$piece work, $($b$)$standard hour plan, and $($c$)$measured day work. Which incentive plan is most commonly used in industry, and why?