6). The following table provides the monthly backlog and forecasts workload in man hours required for the electrical craft. You are required to plan the capacity for the Electrical section. There are two types of Electrical work classified as priority one and two based on urgency. There are three sources of supply for the manpower. These are in house crafts in two categories highly skilled and regular skill, over time and contractors. The cost of in-house highly skilled craft man hour is 50 SR and the cost of in-house regular man hour is 30 SR.. The productivity of the highly skilled craft is 100%in both priorities and for regular craft 80% for both priorities. The overtime crafts costs 30% more for each type and the contractor costs 100% more than the regular in house for each type. Historical data has shown that the percentage of priority one Electrical work is 40% of the total load and the rest is priority 2. The company has a policy that over time should not exceed 25% of in-house man hours and contract work should not exceed 50% of the total load. It is desirable to have backlog from priority two workload and there should not be any backlog from priority 1 work. If one unit of work is backlogged for one period it will cost 5 SR.. The sources of manpower are specialized crafts, general crafts for hire and outsourcing. The supply of manpower for specialized or regular for hire or outsourcing abundant in your answers assume it is 500 for skilled, 500 for regular and 500 for outsourcing in each category.. Table 1 provides the data for the forecasted load in each period of the three periods.. Month #Backlog 60 1 2 3 Forecasted load 140 220 200 Table 1: Data on Forecast and backlog