When making comparisons it is ...
Published by Peter Styles, Independent - Consultant (retired)
When making comparisons it is useful to use consistent and stable units. Thus flow needs to be in megaliters per day (Ml/d) and currency $ (USD). It is also useful to comprehend the difference in the ratio of civils to M&E. Typically in developed countries where plant is manufactured at home the ratio is 2/3 civils to 1/3 M&E whereas where the mechanical plant is imported the ration is 1/3 to 2/3.