ELECTRIFICATION & OLE
Time-distance planning – a different dimension for project planning
The Linear Scheduling Method (also called Time-Chainage and March Charts) is a technique that locates activities not only in time, but also in distance. Richard Ormerod of Asta Development looks at how this allows a unique appreciation of the conflicts and sequence in which activities can be undertaken and why it is often preferred to the non-linear methods of Gantt charts and traditional project planning software like Microsoft Project and P6.
L
inear plans let you see where you will be at a specific date (or visa versa).
Linear plans let you see/calculate the rate of production – a gradient to see how fast things will happen.
Most importantly linear plans
identify where conflicts can happen and provide a way of avoiding them.
The Linear technique is one which has been around for many years. People often draw plans just as a picture using CAD or Excel. This quickly becomes cumbersome as it is only a picture and changing it is time consuming. TILOS was developed to overcome these issues and combine both time and distance in one editing environment and includes powerful calculation, import/export and progressing abilities.
The TILOS software system is used extensively by Network Rail and its supply-chain for short- term possession plans. TILOS is also being used by Crossrail for planning and coordinating construction works and on HS2 to coordinate
and visualise the construction phase schedule on 5 geographical areas between London Euston and Birmingham plus the railway systems. It is used to brief internal stakeholders and is acknowledged to be a very effective way of assimilating such a massive programme of works.
FOR MORE INFORMATION
E:
richard.ormerod@astadev.com W:
www.astadev.com/tilos
rail technology magazine Jun/Jul 13 | 73
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