BIM Derived Quantity Checks for Takt Planning Control in Interior Works: Identifying Capacity Sensitive Work Packages Through a BIM to Excel to Revit Workflow

Abstract

Takt planning in construction organizes trades through defined locations and repeated work packages so that production can follow a planned rhythm. During interior works, that rhythm depends on whether the work assigned to each location can be completed within the available takt time and whether the information behind the plan remains sufficiently stable. Design changes can alter the quantity of work assigned to a zone, while planning assumptions such as productivity determine how that quantity is translated into time. This thesis examines how BIM-based quantity information can support takt planning control and revision support in interior works by making this relationship visible at the level where production is planned. The research is framed through design science because it develops and demonstrates a planning-support artifact in response to a practical information problem. Nine semi-structured practitioner interviews provide experience of takt planning and control, while a controlled Revit prototype and an anonymized residential build ing model are used to develop and demonstrate the artifact. The resulting BIM to Excel to Revit workflow extracts model quantities through Revit schedules and converts them into planning information in Excel. Selected plan information is then prepared for writeback to Revit through Dynamo and CSV files. The calculation uses one work package in one zone as the planning unit. Quantity is translated into cycle time through a productivity assumption and compared with the selected takt capacity through overload and loaded ratios. The controlled prototype demonstrated one planning unit that exceeded the complete takt period and another that remained within it while occupying part of the selected load-adjusted capacity. In the project-model application, every planning unit required one takt period under the final crew-based productivity assumptions. Loaded ratios still varied across the work packages, showing differences in the share of the selected load-adjusted capacity occupied by their calculated cycle times. The interviews place a boundary around what this quantity-based check can represent. Practitioners described production problems that arise even when the planned workload appears feasible, such as missing prerequisites and failed handovers. These conditions depend on site control and production knowledge that are outside the quantity calculation. The workflow therefore represents the part of takt reliability that can be examined through modeled work content and the assumptions used to translate that content into takt capacity. The theoretical contribution lies in the operational connection between BIM-derived quantity information and planning-stage takt capacity through the combined planning unit of zone and work package. Existing research provides time-based workload logic for takt planning and separate approaches for structuring BIM information for production. The workflow connects these areas by carrying BIM-derived quantities into zone and work-package capacity calculations under visible assumptions and retaining separate model and plan states for traceability. Its interpretation remains bounded by the available model condition, the selected quantity drivers, manual coding, and productivity assumptions. Repeated real project revisions were outside the empirical test.