Linear Scheduling Method

ImageAlternate names have been used for the linear scheduling method such as: Location-based scheduling, Harmonograms, Line-of-balance, Flowline or flow line, Repetitive scheduling method, Vertical production method, Time-location matrix model, Time space scheduling method, Disturbance scheduling, Horizontal and vertical logic scheduling for multistory projects, Horizontal and vertical scheduling, Multiple repetitive construction process, Representing construction, Linear scheduling, Time versus distance diagrams (T-D charts), Time chainage, Linear balance charts, and Velocity diagrams.

Types of Analyses

A time–distance diagram for the construction of a motorway created with TILOS

Types of Analyses

A time–distance diagram is generally a diagram with one axis representing time and the other axis distance. Such charts are used in the aviation industry to plot flights, or in scientific research to present effects in respect to distance over time. Transport schedules in graphical form are also called time–distance diagrams, they represent the location of a given vehicle (train, bus) along the transport route. In linear construction projects such as roads and tall buildings with floor by floor trade work, pipeline, rail, bridge, tunnel, road, and transmission line construction.

The advantage of a time–distance diagram is that it nicely shows all visible activities along the construction site on a single drawing.

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James G. Zack, Jr.
Executive Director
Navigant Construction Forum,
Navigant Consulting, Inc.


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Impact Documents

Field Work Stoppage

Activity/Task Work Stoppage


Speed Memos/E-mails

Delay Notification

Cost Impact Notification