Every technology evaluation template scores capability and cost in the same weighted number, which hides the operating bill until after the choice gets made. That mechanism is not unique to software. NASA's own systems engineering handbook found that a program typically spends only about 15 percent of its life-cycle cost during design. That same design work commits roughly 75 percent of everything the program will ultimately cost, because the design decision determines what gets built, tested, and operated afterward.
This pack keeps the two numbers apart on purpose. A weighted comparison scores every candidate on capability only, cost excluded from the criteria entirely. Anything within ten points of the leader runs a timeboxed proof of concept against the same real workload, logging latency, the error rate at real burst load, and the engineer hours the trial consumes. Only then does an operational cost estimate turn those numbers into a multi-year bill, and the winner gets recorded the way a settled architecture decision is: one paragraph naming why every other option lost.
At Priorwood Analytics, replacing a job queue that was dropping jobs under burst load, the managed candidate won the weighted comparison at 85 out of 100, nine points ahead of a self-hosted broker at 76. The proof of concept and cost estimate reversed that: the managed option cost $62,360 to run for two years against the broker's $40,640, a premium the six capability criteria never asked about. Priorwood picked the broker. Once a technology is chosen, the solution architecture document covers what it slots into, and a migration plan covers replacing the old system.
Weighted Comparison