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Equipment procurement covers costs associated with the purchase of hardware and software including programmable logic controllers (PLCs), instrumentation, SCADA computers, software, and electrical support equipment (conduit and wiring, etc.). Estimations of control system hardware and software pricing should include vendor quotes, contractor overhead, profits, and bonding and insurance. The level of detail required for accurate quotes includes unit quantities, input/output point counts, operator interface requirements, and construction sequencing or schedule constraints.

Application programming includes programming of PLCs or remote terminal units and development of process graphic displays, reports, and network configuration. Depending on the level of complexity of process control strategies, the actual costs incurred from this work can be highly variable. Application programming also represents the most difficult area of work to estimate correctly.