I can answer for the previous job I had. When I joined, we had a process where
1. A plan took roughly 40 person-hours to make.
2. The plans were meant to cover 6--18 months, although a bit unclear at times.
3. These plans were generally made 5--6 times per year.
4. 100 % of the plans were abandoned for something more profitable.
5. About 80 % of the time when something more profitable came up, we chose to pass it up to stick to the plan.
Halfway through my time there, we had a change of process which moved emphasis much more toward short-term planning. The long-term plans became much more flexible. I would summarise the outcome as
1. The long-term plan is built in 4 hours.
2. It still covers roughly 12--18 months.
3. The plans are adjusted to agree with reality every 5 weeks or so.
4. The long-term plans are still abandoned around 100 % of the time.
5. We now pass up on around 50 % of the more profitable things.
1. A plan took roughly 40 person-hours to make.
2. The plans were meant to cover 6--18 months, although a bit unclear at times.
3. These plans were generally made 5--6 times per year.
4. 100 % of the plans were abandoned for something more profitable.
5. About 80 % of the time when something more profitable came up, we chose to pass it up to stick to the plan.
Halfway through my time there, we had a change of process which moved emphasis much more toward short-term planning. The long-term plans became much more flexible. I would summarise the outcome as
1. The long-term plan is built in 4 hours.
2. It still covers roughly 12--18 months.
3. The plans are adjusted to agree with reality every 5 weeks or so.
4. The long-term plans are still abandoned around 100 % of the time.
5. We now pass up on around 50 % of the more profitable things.