📘 engineering economics

1. **Problem Statement:** A firm must choose between two production systems A and B with given costs, lifespans, operating costs, and other expenses. We need to compute the Equival

1. **Problem Statement:** We have a maintenance project with an initial cost of $100,000 in Year 1, increasing by $15,000 each year. The MARR (minimum attractive rate of return) is

1. **State the problem:** Calculate the profitability index (PI) and the modified benefit/cost (B/C) ratio for a wind turbine project with given cash flows, a MARR of 10%, and a pr

1. **Problem 1c:** Find the 2000 purchased cost of a heat exchanger with 30 m² heating surface, given 1990 cost for 100 m² is 4200, purchased cost capacity exponent 0.6 for surface