Tracing Construction Claims Through Cost, Quantity, and Work Stoppage Records in a Thermal Power Plant

Construction claims in engineering, procurement, and construction projects are often presented as monetary totals, while the records needed to interpret their scope, valuation, and time consequences are distributed across different document types. This study examined three claim bundles from the coal-handling works of a thermal power plant in the Republic of Korea: an additional sump-pit structure, revised shed paving quantities, and a disputed work stoppage. A documentary evidence-chain method separates the initiating event, version of the work and quantity, pricing basis, parties’ positions, and schedule evidence. Cost figures are expressed as percentages of a specified subtotal within each bundle. Materials account for 56.70% of the sump-pit net estimate; a further paving request constitutes 59.63% of the cumulative paving summary, while its quantity estimate is based on a different starting value from a separate summary. In the stoppage bundle, the current request accounts for 84.78% of its cumulative summary, and correspondence contests the eligibility of the claimed time and cost categories. These contrasts demonstrate why an internally consistent cost share, documented change, and extension-of-time entitlement require distinct evidence. The proposed record sequence clarifies the inputs required for valuation and identifies the schedule information needed before a delay can be allocated. The findings concern documentary sufficiency in a single project; contractual and time-related outcomes require further governing-contract and schedule records.