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A short class with Sarah and her students. The other ways are under More.
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Let's start with the balance number of trucks needed for one loader. Does anyone remember how we calculate this balance number?
Is it based on the truck cycle time divided by the loader cycle time?
Exactly! The formula is: Balance Number = Truck Cycle Time / Loader Cycle Time. Can anyone share the estimated values we discussed earlier?
The truck cycle time was 39.5, and the loader cycle time was 5.5.
Correct. This gives us a balance number of approximately 7.18, which tells us how many trucks we ideally need per loader.
Now that we understand the balance number, let's evaluate how increasing the number of trucks affects productivity. What happens when we use fewer or more trucks than the balance number?
If we have too few trucks, productivity will be limited by the truck cycle time, right?
Exactly! When the trucks are fewer than or equal to the balance number, truck cycle time dominates productivity. Can someone give an example of productivity at different truck counts?
For 5 trucks, the productivity is 62.65-meter cubes per hour.
Well done! As truck counts increase to 7, we achieve 87.71, but what about if we go beyond?
Beyond the balance number, the loader dictates the productivity, which caps at 90-meter cubes per hour.
Let's move on to the economics of truck-loader operations. How do we assess whether to go with 7 or 8 trucks?
We need to look at the unit production cost associated with each option, right?
Exactly! The unit cost is calculated as Total Cost / Productivity. Can anyone calculate for 5 trucks?
For 5 trucks, with a cost of 10950 rupees and productivity of 62.65, the unit cost is 174.78 rupees per meter cube.
Great! And what would be the unit cost if we increase to 8 trucks?
Well, since productivity caps at 90, the unit cost would be higher due to increased truck costs.
Precisely! That’s why it’s often better to round down to the balance number.
Seven trucks and the loader's strong, keep productivity flowing along.
Imagine a busy construction site where a loader and trucks work together. More than seven trucks just means they wait, not creating a productive fate.
BATS - Balance number, Avoiding Too many trucks, Saves money!
TRACK - Trucks, Rate, Analysis, Cost, Kilograms - factors to consider for efficiency.
Term
What is the balance number?
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Term
Define unit production cost.
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The optimal number of trucks needed to operate efficiently with one loader.
The amount of time a truck takes to complete a full cycle of loading and unloading.
The time taken by the loader to load materials onto a truck.
The cost incurred to produce a unit of material, calculated by dividing total costs by productivity.
This section emphasizes the significance of economic evaluation in optimizing productivity and minimizing costs associated with truck-loader operations.
The section elaborates on how proper economic evaluation can determine the optimal number of trucks needed per loader, illustrating the relationship between truck cycle time, loader cycle time, productivity, and unit production costs.
In this section, we delve into the economic evaluation crucial for determining the balance between the number of trucks and the productivity of a loader. The calculation begins with identifying the balance number by dividing the truck cycle time by the loader cycle time. The resultant balance number indicates the number of trucks per loader necessary for efficient operation. The section explores scenarios involving various numbers of trucks (5-9), analyzing how productivity and unit production costs fluctuate. It is noted that while some productivity gains are evident up to the balance number, increasing trucks beyond this point does not yield additional productivity improvements, leading to inflated costs without benefit. A comprehensive understanding of these principles assists in making informed decisions that ultimately enhance operational efficiencies and cost-effectiveness.