Setting a condition-based schedule for an activity definition
You can set a schedule for an activity definition that is based on the predicted deterioration of the linked asset or building element.
The following criteria are taken into account during the process of scheduling condition-based activity definitions:
• Start date-time of the activity definition
• Asset / building element
• Maintenance regime (must be condition-based)
• Condition after maintenance
• Minimal period
• Deterioration period
• Required condition
• Asset condition details
 | If any one of these variables is absent, the schedule cannot be calculated and no activities will be scheduled. |
For the procedure, refer to:
During the compilation of the maintenance plan, maintenance activities with the same asset condition details are grouped and rescheduled.
| | When condition-based activities are scheduled, the Quantity and Unit of measurement fields are automatically updated according to the associated Asset condition details. |
Example
Suppose there is an asset, ‘Brick wall’ for which you want to add an activity definition ‘Painting a wall’. Based on the selected deterioration curve, Planon ProCenter calculates a deterioration period for the paint on the brick wall. Thus it is determined when repainting is required.
| | Deterioration curves are added in Supporting data . See the Maintaining deterioration profiles for more information. |
The following table shows an example of a deterioration curve based on the condition score of an asset:
Deterioration Factor (x) | Condition Score (y) |
|---|---|
0 | 1 |
0.5 | 2 |
0.75 | 3 |
0.875 | 4 |
0.9375 | 5 |
1 | 6 |
This deterioration curve is used to calculate the date when this brick wall needs maintenance.
Item | Field | Value |
|---|---|---|
Activity definition | Activity | Painting the wall |
Start date-time | 1-6-2010 | |
Asset/building element | Brick wall | |
Maintenance regime | Condition-based | |
Condition after maintenance | 1 | |
Schedule condition-based activities action | Deterioration period | 2 years |
Minimal period | 3 months | |
Asset condition detail | 100 m², 2 | |
Asset | Description | Brick wall |
Required condition | 4 | |
Deterioration curve | DC01 | |
Asset condition | Survey date | 1-1-2010 |
Asset condition detail | Quantity | m² |
Quantity | 100 | |
Observed condition | 2 |
Suppose a survey took place on 1/1/2010 and the Observed condition of the asset is 2. At this point of time, no maintenance of the brick wall is required, as the Observed condition does not match the Required condition 4. Now, you can calculate how long it will take to reach condition score 4, which is the moment maintenance is required to bring the wall back to a better condition. In this case, the maintenance activity will bring it back to Condition after maintenance score 1. Planon ProCenter schedules the date-time of the first activity on the graphical planner.
The Deterioration period of activity ‘Painting the wall’ is 2 years. This means that the paint has completely deteriorated after 2 years.
Calculating the time it takes to reach condition 4 is done as follows:
The factor of the (Required condition) - (Observed condition) =
Deterioration factor (0.875 - 0. 5) = 0.375
Remaining deterioration period = Deterioration period * 0.375 = 0. 75 years.
Therefore, after 0. 75 years (9 months i.e. 1/9/2010) the first maintenance activity is required.
If the Observed condition has a higher value than the Required condition, the activity is scheduled on the current date.
On 1st August 2010, the asset’s condition is brought back to condition 1 and subsequently Planon ProCenter calculates how long the same asset will take to deteriorate to condition 4.
All subsequent maintenance activities will have the same recurrence.