1. What is Activity Movement Chart?
An Activity Movement Chart is a diagram to present activities in general and easy-reading way. Its X-axis represents the geometric location and the Y-axis represents the time. An example of extraction of an actual Activity Movement Chart is something like this.
A “Block” is a working unit or basic resource allocation unit. Look at the typical “Block” below.
3. Group of “Block”---To Cover the whole structure
4. Network CPM---Another Way to Present Logic
In classic network, an activity has two predecessors, one is technical or work sequence control (hard constraint), the other is resource control (soft constraint). An example is below. Comparing with Activity Movement Chart, the former is the same, but the latter is different. In order to have concordance, practically, we have to control the start and finish point (key dates) of the group of blocks to make the two the same timing.
· Activity Movement Chart presents activities in general and diagrammatic way.
· The start and finish of the diagram are correspondent with P3’s late start and finish time.
· A “Block” is a working unit or basic resource allocation unit where at certain time only one working team of the trade is allowed to occupy it. Therefore, no overlap is existed between the different trades. Work is carried out in sequential order within a “Block”.
· Each block has the same trades.
· Duration of each trade to carry out its work is determined by team production rate and quantity.
· Cycle time for a working team is controlled by the key dates of the Block group. Enough resource (number of team / gang / rig) is to meet the determined cycle time.
· Set of formwork can be inferred from the chart. In the above diagram, 1 à 3; 2 à 4, so total is 4 sets.
· If the activity is presented in the form of line, the neighbouring lines shall not be crossed, such as
are not allowed.
· In the example of the construction of the underground train station, activities will start at both ends of the station and proceed towards the middle, i.e., work will progress on two fronts to meet at the middle block. This arrangement is to allow for various types of E&M rooms which are normally located in either ends of the station to be completed in early stage. This principle is also applied to all linear shape structures, where the X-dimension is much greater than Y-dimension.