On average it is necessary to assign: 2 diesel fitters (1 certified plus 1 apprentice) to motor…

On average it is necessary to assign:

• 2 diesel fitters (1 certified plus 1 apprentice) to motor repairs

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• 2 mechanical fitters (1 certified plus 1 apprentice) to mechanical repairs

• 1 boilermaker/welder to structural repairs

• 1 mechanical fitter to PMs, accessories and miscellaneous repairs

• 1 electrician to electric repairs

If (a) the mine works 12 hour shifts on a 8×6 panel roster (8 days on followed by 6 days

off, with FIFO travel time included in the 8 days) (b) each worker is entitled to 4 weeks

leave per year and (c) average time-on-tools (worker efficiency) is 45%:

(xvii) Calculate the number of diesel fitters, mechanical fitters and electricians

necessary to maintain the fleet of 49 trucks. (3 marks)

(xviii) If the span of control is 1 supervisor to 8 maintenance workers, calculate the

number of supervisors that the mine will need to hire. (2 marks)

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