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A Time/Location chart is a graphical representation of a program against axes of time and location, where location can be distance, number, level, etc.

They are known by names such as Time/Chainage, Sloping Barcharts, March Charts and Line of Balance, and are suitable for programs of hi-rise buildings, roads, pipelines, rail lines, tunnels and mine shafts

Hi Rise buildings are ideal for Time/Location and the effects of varying cycle times can be tested quickly and demonstrated graphically.

This example shows the progression of an incrementally launched bridge where the shape of the program closely mirrors the form of the structure. The progress of the construction is readily understood in this format and faulty sequences are easily spotted

Linear projects such as this railway line are well suited to Time/Location and show the flow of teams across the program. Production codes can be attached to selected activities and varied to test the effect on the overall program.

In this program, the tunnel is driven at a rate of 15m per day. Changing this to 20m per day immediately re-calculates and re-draws the program.

What’s behind Time/Location?

Any SitePlan program can be plotted on Time/Location provided the activities can sensibly be given a position on the location scale.

The railway line Time/Location that was shown on the previous page was derived from the program shown here in barchart form. This example is used in the following pages to illustrate the main principles of Time/Location

Keep it Simple/

Only selected activities should be included on a Time/Location chart and these should describe the main ideas or elements of the program.

A common mistake is to cram on too much detail with a consequent loss of clarity and increase in complexity. The whole objective is to make the program clear and easy to understand.