Coordonner les décisions de durabilité dans les opérations cloud : une approche par matrice de planification

Cloud operations involve interdependent decisions spanning long-term infrastructure commitments and short-term operational control under cost, performance, and sustainability constraints. Sustainability targets become actionable only when KPI boundaries and resolution are defined consistently across these layers and when handoffs specify what is binding downstream. We introduce a planning matrix that organizes cloud decisions across time horizons (strategic to real-time) and organizational stages (procurement to sales), and a cell-to-method workflow that turns managerial questions into decision-support specifications---constraints, KPIs, and handoff artifacts---usable by operational research methods. The workflow fixes the horizon, KPI definitions, and downstream obligations to support consistent and auditable planning. As an illustration, we instantiate the Strategic $\times$ Procurement cell (Land \& Building Strategy) as a capacitated facility location model with CO$_2$ and water extensions. The numerical example compares hard budgets with internal prices, showing how upstream sustainability regulation changes location portfolios and exposes cost--impact trade-offs.