A logistics planner adds pallet weights from two depots into one trailer total. One depot records pounds and the other records kilograms, and the summed figure sits far above the trailer's real load. What must happen before those weights are added?
Select an answer to reveal the explanation.
Short Explanation
You cannot add a ruler marked in inches to a ruler marked in centimeters and call the sum a length. Pounds and kilograms are different scales, so your trailer total is fiction until you convert them onto one unit. Rounding or a z-score does not do that conversion.
Full Explanation
Adding measurements is valid only when they share a unit. Pounds and kilograms quantify the same physical quantity on different scales, so the raw numbers must be converted onto one scale before the trailer total is a load. Dividing the mixed sum by the number of depots produces an average of incompatible numbers, not a corrected weight. A z-score puts each column on a statistical scale with no physical unit, and the sum of those scores is not a trailer load that can be compared with a capacity. Rounding to integers does not change a pound into a kilogram or the reverse; it only drops a fraction. The source files can stay as they are if the conversion is applied in the total, but the numbers that are added must already share one unit. Exam caveat: the conversion has to be the one between these two mass units, and a later display unit can be either pounds or kilograms as long as both depots were converted before the add. Operational check: convert one known kilogram pallet into the pound scale used by the other depot and confirm the trailer total changes by that pallet's physical weight.