A systematic approach to finding internal rate of return using the interpolation method, based on 'big vs. small' concept
by Jun Jie Ng
International Journal of Education Economics and Development (IJEED), Vol. 4, No. 3, 2013

Abstract: Engineering economy entails the dollars-and-cents side of the decisions engineers make today (Sullivan et al., 2012). In the context of engineering economy, engineers make recommendations to work proposals and compare these alternatives based on several criterions. One such criterion is the computation of internal rate of return (IRR) during an incremental analysis process to determine if a project is worth investing today. This paper presents a systematic rather than mathematical aspect of determining IRR using the interpolation method that will ease manual calculations. This will be useful for learning engineers in higher level schools and institutions in learning this concept for the first time in-class.

Online publication date: Sat, 10-May-2014

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