A flowchart is a common type of diagram, that represents an algorithm or process, showing the steps as boxes of various kinds and their order by connecting these with arrows. this diagrammatic representation can give a step-by-step solution to a given problem. data is represented in these boxes, and arrows connecting them represent flow / direction of flow of data. flowcharts are used in analyzing, designing, documenting or managing a process or program in various fields. as such in an enery audit study it can be effectively used to find out the various aspects of energy input ,output, transit loss etc

Pre audit phase i - Plan and organise with Eneregy manager or Plant Manager
Audit Phase ii - Primary data collection , Process flow and energy utility diagram.Details of energy use.
Analysis of energy use.Identify development of energy conservation opportunities
Cost benefit analysis ,Reporting to Decision makers in Plant.
Post audit Phase iii - Implementation and follow up.

The audit focus area depends on several issues like consumption of input resources, energy
efficiency potential, impact of process step on entire process or intensity of waste generation /
energy consumption.