It is my opinion that the implementation and results of forecasting should fall under the Supply Chain responsibilities.
HOWEVER, there are many types/ways to forecast. I beleive it is a must to include all stakeholders (the sales and marketing departments, accounting/cashflow department, and the customers) to have input and resulting buy-in during the planning stages of a Company's forecast. The forecasts must be monitorored throughought the year as changes in the market demand are likely to occur. One-team is the best team, with Supply Chain department as the leader' and charged with it's ultimate success or failure.
Supply Chain Professonal
I have attached a document explaining step by step about forecasting, demand planning and inventory management.
Forecasting belongs to Supply Chain Management, but you have to be technically oriented to understand the techniques,
and the planning process of it, otherwise you will fall into the field of speculation, guessing and hot air talk, regards ....Luis
As a former business owner and someone who has managed most every link in the Supply Chain over the last 20+, I would like to share my thoughts on your topic.
In my opinion Forecasting is the single most important piece of business planning and executuion during the 12-month fiscal year. It is my belief that while Forecasting should be a collaborative effort of the Sales, Marketing, and Supply Chain Managers, it is the SC Manager's responsibility to take the lead role and be accountable for having the correct products arrivie at the approriate time with good quality and reasonable profit. Sales and Marketing must buy in to the plan to ensure its success.
There are many different types and models of Forecasting. It is my belief that THE most important element of the Forecast is the review of the actual Monthly Sales figures, available on-hand inventory, work in progress and product on the water, as they compare to the original plan. Each month (or quarter) it may likely be necessary to make adjustments to the Forecast as needed to end the year as successfully as possible.
No one is more aware of production problems, schedules, quality, changing costs, and on-hand inventory than the Supply Chain Manager, and therefore it is he/she that should be the point person communicating timely with all stakeholders.
It seems I am a bit late to the topic but it seems like a good exercise anyways.
From my perspective, normally supply chain owns the forecast management, but does not own the forecast, at least not entirely.
Sales & Marketing (and Program Management ) should be the owner for the forecast, even if we speak about tier 1 or tier 2.
In my utopic view on the subject, there should be an internal sales forecast, which should come from the Sales and Marketing ( they know the market conditions and trends, know or should know customer or market trends and specifics). This original forecast should be analyzed and discussed with the Supply Chain and the outcome and figures should be executed. In discussion: demand expectations, cost expectations, profit expectations, risk management. (Supply Chain should bring inputs on supply from experience, what is the best outcome in ITO in a cost effective manner, what might be the risk, etc. )
A monthly review is always required to check the progress and changes on the medium and lon term:
- sales forecast accuracy ( is original sales forecast in line with the actuals ? )
- demand drop vs. demand increase - costs vs delivery accuracy ( is it necessary to increase inventory to reach better OTD to sales forecast ? )
- history analysis (is there any trend or pattern you may apply to future forecast? )
- establish patterns for supplier action/reaction to demand increase/demand decrease and take decisions: safety stocks, extra forecasting, reduced lead time programs/ VMI.
Reality is totally different from what I described above. Take for example the car industry.
Sales and Marketing of the car manufacturer says 80k pieces sales/year. This is not enough and supply chain can't make assumptions of their own on how to split these in monthly/weekly demand. If SP is wrong, they will have disruptions and extra costs all over the supply chain under. So most of the times they send the same thing to the tier 1, 80k per year firm demand only for short term
Sales and Marketing of the tier 1 says 80k pieces sales / year. Supply chain takes decisions on how to split in monthly/weekly demand. If SP is wrong, they will have disruptions and extra costs all over the supply chain under. So most of the times they send the same thing to the tier 2, 80k per year and firm demand only for short term
Sales and Marketing of tier 2 says 80k pieces sales / year. In the end, only the Supply Chain of tier 2 takes the decision to split the yearly demand in weekly/monthly volumes to cover medium and long term. Tier 2 can't work with short term demand (4-6 weeks ) as the lead time of electronic and mechanical parts are 90% over 10 weeks.
Main conclusion: If your forecast is not detailed and accurate, be sure the tier under you and the tier under them will make some forecast assumptions on their own which will for sure disrupt your supply chain or will increase the costs. I'd say it's wrong to rely only on the supply chain to manage and own the forecasting process.