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Iron Ore Case Analysis Essay

Decent Essays

MBA 816 Operations & Production MGMT

Iron Ore Company of Ontario “A3 Written Assignment”

December 12, 2011

Presented to: Dr. James Mason

Presented by: Ahmed Omar Afify Student ID: 200-305-478

------------------------------------------------- Issues * To minimize total waiting time and stockpile re-handling costs (Keep operations costs as low as possible). * To improve productivity process and decreasing idle time of machines and labor.
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Background * Iron Ore Company of Ontario is working in the business field of processing iron ore. * Production was scheduled on a …show more content…

Each Shovel takes 11.5 m3 / load with 480 m3 / hr to get 0.024 hr/load. Each Truck takes 36 m3 / load with 128 m3 / hr to get 0.28 hr/load. Load a truck 36 m3 / load with Shovel 480 m3 / hr to get 0.075 hr/load. Dump time by a truck in hr is given as 1.7 min or 0.028 hr. Calculations | Shovels | Trucks | Hr / load | 0.024 | 0.28 | Load time for a truck / shovel by hr | 0.075 | Dump time for truck by hr | 0.028 | Trip time for truck without load and dump time by hr | 0.177 |

The whole trip takes 0.28 hrs or “16.8 mins”.
Trip= time taken to load truck by shovel + time taken from shovel to crusher+ time taken for dumping+ time taken to drive back from crusher to shovel.
So 0.28 = 0.075+ time taken between shovel and crusher (twice) + 0.028
So time taken between shovel and crusher (twice) is 0.177 hrs, so each trip takes 0.0885hrs (5.31 mins).

Exhibit 8 “Distribution of crusher delays during day shift”
From summary Statistics, we found that: * Mean Delay = 12.86 minutes = 0.214 hrs * Number of Delays = 332 * Sampling Interval = 120

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