CNST 361 3-18-08

# CNST 361 3-18-08 - CNST 361 Chapter 13 Velocity Diagramming...

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CNST 361 3-18-08 Chapter 13 - Velocity Diagramming Velocity Diagrams are another option to creating schedules for certain types of work: Repetitive work (i.e. Roads, utilities, etc…) ‘Horizontal’ rather than ‘vertical’ work. Velocity Diagrams used to schedule linear (sequential) projects. Graphically displays possible time and space conflicts between activities. The actual diagram identifies time (duration) on the X-axis and the amount of work on the Y-axis. When activities are plotted on the matrix and their lines cross; a conflict occurs. (example on P. 151 in textbook) When the productivity of activities change in the sequence, the potential for a conflict occurs. The next activity in the sequence is started as soon as possible, while ensuring that a conflict is avoided. The ‘buffers’ which occur between activities are of: Time - difference along the X-axis.
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Unformatted text preview: Space - difference along the Y-axis. The steps to creating a Velocity Diagram: ID the activities and production rates ID the sequence of activities Set-up the axis’s for the velocity diagram The Y-axis will culminate with the total quantity of work to be completed. The X-axis may be schedule driven (unsure of end until calculated) or may be controlled by an Owner provided end Plot the velocity diagram for the first activity beginning on Day 1. Plot each successive velocity diagram taking into account conflicts with the previous activity. If there is no conflict (same or lower productivity); consider starting next activity on the next day(s) If there will be a conflict because of an increase in the productivity; adjust the start date to avoid conflict Verify that buffers ID’d in the diagram are realistic...
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• Winter '08
• Scigliano
• Velocity Diagramming Velocity, successive velocity diagram

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