Estimation & Costing

The quantity-surveying and cost-control course — how a designer forecasts what a project will cost, builds up rates, prepares a detailed estimate and bill of quantities, costs the real interior items, and writes the specifications and tenders that let work be priced and awarded. It is the money spine of the whole programme, and it is honest about the wishful thinking that hurts a client most. Its first correction sets the tone: an estimate is a forecast, not a fact and not a fixed quote — a prediction made before the work that carries real uncertainty, which is why a rough estimate, quick and approximate for feasibility, and a detailed estimate, slow and itemised for tender, are different tools of different accuracy, and why a single confident-looking figure hides the range it truly is. It teaches the fundamental equation, that cost equals quantity times rate, as two separate skills: measuring the quantities by taking them off to a consistent method of measurement, and analysing the rate. It insists a rate is not a magic market number but something built up from its parts — material plus wastage, labour from output norms, plant and equipment, and then overhead and profit — which is exactly what India's Delhi Analysis of Rates does behind every rate in the CPWD Delhi Schedule of Rates, the country's most-used rate book. It organises the estimate as an abstract and a bill of quantities, every item with its quantity, rate and amount summing to the total, the auditable backbone that is tendered and paid against. It is blunt that a contingency is honesty and not padding — a percentage for the unforeseen is a professional admission that estimates are uncertain, and removing it does not make a job cheaper, it just moves the risk onto the client later — and that overhead and profit are legitimate real costs that must be visible, not greed to be squeezed out, because a quote that hides them buys cut corners. It teaches that the cheapest quote is not the cheapest project, since a low bid usually means missing scope, cheaper substitutions or variations and claims later, so quotes must be compared like for like on the same specification and bill of quantities or they compare nothing. It shows how specification governs cost, because you cannot price good tiles until the grade and standard are fixed, so changing the spec is how you change the cost honestly through value engineering, never by hiding a downgrade. It covers the practical costing of real interior items — electrical fittings, tiling, plaster, joinery and its finish, the many types of painting and polishing, plumbing and sanitaryware, false ceilings, partitions and every kind of flooring — and it sets all of it inside specifications and tenders, contracts and their types, billing and certificates of payment, schedules and analysis of rates, and the arbitration and legal frame around a construction contract. And it ends where the objective points, on cost control: the estimate is the start of controlling cost and time, a living tool to monitor actuals against forecast and manage variations, because we-will-sort-the-money-out-later is how projects overrun. Taxes, in India the eighteen percent goods and services tax on works contracts, and professional fees are part of the true cost throughout, not afterthoughts. The whole course treats cost as a discipline of honesty owed to the client, and names the shortcuts that betray it.