Cash Flow and Its Calculation

This course is delivered in Chinese with English slides and subtitles.

The core of Engineering Economics is to evaluate the economic effectiveness of engineering projects and technical activities. The foundation for all such analysis is "Cash Flow." This opening chapter aims to establish this central concept and master its fundamental calculation methods.

First, the chapter clarifies the definition of cash flow, which refers to the total actual cash inflows and outflows occurring at various points in time within a specific system (such as an investment project) over a calculation period. By constructing intuitive cash flow diagrams, the complex movement of funds throughout a project's life cycle can be transformed into a clear time-value sequence. This is an indispensable tool for economic analysis.

Secondly, the time value of money is a cornerstone principle of engineering economics. This chapter emphasizes this principle: money has a time-dependent value, meaning equal amounts of money at different points in time are not equivalent. Therefore, cash flows occurring at different times cannot be simply summed. To address this, we will learn basic equivalence calculation formulas, including single-payment and uniform-series compound amount (future value) and present worth (present value) factors. These calculations are key to translating the time value of money and lay a solid theoretical and technical foundation for subsequent in-depth economic evaluation.

In summary, the content of this chapter forms the cornerstone of the entire course. Accurately understanding and skillfully applying cash flow and its calculations is the essential first step toward making scientific economic decisions for engineering projects.