Rolling planning
The rolling planning (also Sliding Planning , Eng. Rolling Wave Planning Control ) refers to a period-oriented planning form, after certain intervals an already-effective planning updated when concretized and revised. The level of detail of such activities that have to take place in the near future is considerably more precise than the planning intensity of projects in later periods. It is used both in the context of project management and in production planning.
example
At time t 0 , the first six periods are initially planned. At the beginning of the following period, the previous planning is revised. The new data obtained in the meantime are taken into account. This update of the original planning as part of the second planning also relates to six periods, that is to say to the period from t 1 to t 7 . The third and all other plans are made in the same way.
| 3. Planning | ||||||||
| 2. Planning | ||||||||
| 1. Planning | ||||||||
| t 0 | t 1 | t 2 | t 3 | t 4 | t 5 | t 6 | t 7 | t 8 |
variants
Re-launch
If existing plans are ignored during a planning run and a new plan is created from scratch instead, this process is referred to as a new plan.
Net change principle
If only those criteria are taken into account that have changed compared to the existing planning, the net-change principle applies. Positive and negative deviations can be netted and included in the planning.
Critical consideration
advantages
Rolling planning is used when the data required for planning purposes, which relate to the near future, can be determined much more precisely using forecasting methods and therefore lead to better results. In addition to reducing the planning uncertainty , the time and personnel required are usually more economical than with total planning .
disadvantage
By strictly adhering to the rigid planning times, the dynamic consideration of important events is dispensed with. In the case of production companies, this can include the receipt of a large order or the failure of a bottleneck machine . Another problem is that regular planning changes can lead to acceptance problems among employees and the associated organizational difficulties. This in turn can lead to an increase in lead times and stocks as well as a decrease in adherence to deadlines .
This is why rolling planning is rarely used in a strict form. Instead, it is combined with the concept of event-based planning .
literature
- Karl Kurb : Production planning and control. Methodological basics of PPS systems and extensions. 5th edition, Munich 2003, ISBN 3-486-27299-3 , p. 112f.