The purpose is to explore what context dependencies within the planning environment of the construction industry that need to be considered designing tactical planning processes. The preliminary result using a Delphi study including architects, clients, contractors, researchers, and suppliers indicates that the top five most important context dependencies are: Several kinds of stakeholders, Several planning phases, Lack of standardisation in planning, Low information sharing, and Opportunistic behaviour. Based on the patterns between the different expert groups two propositions are developed, indicating lack of shared understanding of planning between different stakeholders in construction and a project focus when thinking of planning.