Engineering Economy Excelerated Ebook ((link)) Review

= -25,000 - 500(P/A,8%,10) + 2,000(P/F,8%,10) = -25,000 - 500(6.7101) + 2,000(0.4632) = -25,000 - 3,355 + 926 = -$27,429

Second gen at year 5: (-8,000 + 500 salvage of first?) Wait — careful. Actually:

First gen: -8,000 - 5,500(P/A,8%,5) + 500(P/F,8%,5) = -8,000 - 5,500(3.9927) + 500(0.6806) = -8,000 - 21,960 + 340 = -29,620 engineering economy excelerated ebook

is not finance. It’s not accounting. It’s the bridge between technical feasibility and financial viability.

Memorize these. Derivation is optional. Application is mandatory. Problem: You need backup power for a remote telecom tower. Two options: = -25,000 - 500(P/A,8%,10) + 2,000(P/F,8%,10) = -25,000

= -25,000(A/P,8%,10) - 500 + 2,000(A/F,8%,10) = -25,000(0.14903) - 500 + 2,000(0.06903) = -3,725.75 - 500 + 138.06 = -$4,087.69 / yr

Master Time, Money, and Decision-Making in Half the Time Chapter 1: The Accelerated Mindset – Why Engineering + Economics Wins You’re an engineer. You solve problems. But in the real world, the best technical solution isn’t always the right one — unless it’s also profitable. Application is mandatory

| | Solar + Battery | Diesel Gen | |--------------|----------------|-------------| | Initial Cost | $25,000 | $8,000 | | Annual O&M | $500 | $2,500 | | Fuel cost | $0 | $3,000 (escalating 5%/yr) | | Lifespan | 10 years | 5 years (then replace) | | Salvage value | $2,000 | $500 | | MARR (hurdle rate) | 8% | 8% |