What must a demand planner do regarding demand planning assumptions?

The focus for a demand planner regarding demand planning assumptions should be on updating and documenting changes. This is essential because demand planning is a dynamic process that requires regular adjustments based on new information, market trends, and changing customer behaviors. By documenting these changes, the planner ensures that there is a clear rationale for assumptions used in the forecasting process, which can then be communicated effectively to stakeholders.

Moreover, maintaining an updated set of assumptions helps in creating more accurate forecasts that reflect the current environment rather than relying solely on potentially outdated or inaccurate data. This practice also facilitates better decision-making within the organization, as all relevant parties can understand the basis for the demand forecasts and contribute to them collaboratively.

Not focusing on updating and documenting can lead to inconsistencies, misunderstandings, and potentially misguided strategies, which highlights the importance of this aspect in effective demand planning.