The Use of Indexes for Trending in Engineering Valuation

The Use of Indexes for Trending in Engineering Valuation

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Author(s): Rowland J. O. Ekeocha

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DOI: 10.18483/ijSci.2289 38 121 49-52 Volume 9 - Mar 2020


Three types of indexes are indicated in this write up namely cost, mathematical and catalog indexes. Cost indexes are used for trending in engineering valuation. A cost index is defined as a dimensionless number used to trend the cost of an item from one time period to another. It is also a ratio of the real price in a given time period against that of a selected base period multiplied by 100. Trending which is one of the methods used in engineering valuation is the application of an index factor to the historical cost of an item in order to estimate the current cost of the item and vice versa. This application is demonstrated in this article. Additional examples on trending are indicated in the supplementary exercises at the end of the article. Indexes are meant to serve as guide and should not be used if more reliable methods are available. Appraisers must therefore exercise caution and good judgment in their use.


Indexes, Trending, Engineering Valuation


  1. Humphreys, K. K. (1991), Jelen’s Cost and Optimization Engineering, Third Edition, Chapter 14, McGraw Hill Inc.
  2. Indexes: Available from Wikipedia, 2019:
  3. Institute of Appraisers and Cost Engineers (IACE) of the Nigerian Society of Engineers (NSE), Machinery and Equipment Appraisal Accreditation Course, parts 1&2, 2019.
  4. Mathematical Indices: Available from http://m/

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International Journal of Sciences is Open Access Journal.
This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Author(s) retain the copyrights of this article, though, publication rights are with Alkhaer Publications.

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