Procurement Strategy and Sourcing Methods
Sourcing and procurement strategy
Procurement strategy starts with the organization's objectives: budget certainty, price competitiveness, sustainability, reliability, and administrative simplicity. These objectives conflict, so define a risk appetite and a decision horizon before choosing a product. Sourcing methods include bilateral contracts, exchanges and brokers, competitive RFPs and reverse auctions, retail tariffs, and self-supply or on-site generation. A fixed-price contract buys certainty and typically carries a risk premium; an index contract tracks a published reference and leaves volatility with the buyer; a block-and-index structure fixes volume and price for a base block while indexing the remainder. Load-following and full-requirements products transfer shape and volume risk to the supplier-at a cost. Traps appear when a buyer compares headline commodity prices without accounting for shaping, capacity, transmission, ancillaries, supplier margin, credit, and contract terms. A low $/MWh index quote can be more expensive than a fixed price after these components. Another trap is assuming an auction always produces the best outcome; poorly specified volume, term, and credit terms can lead to risk premiums or non-conforming offers.
Worked example: an operator needs 100,000 MWh over 12 months. It fixes 60% in three 20,000 MWh tranches at $45, $47, and $50/MWh and indexes 40% at an expected $48/MWh. The weighted fixed cost is (20,000×45 + 20,000×47 + 20,000×50)/60,000 = $47.33/MWh. Total expected cost is 0.6×47.33 + 0.4×48 = $47.60/MWh, before fees. Laddering reduces timing risk but does not eliminate it. Rule of thumb: match contract tenor to the budget cycle and hedge only the volume you can forecast with reasonable confidence; keep a documented rationale for each tranche.