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Background: Waiting time in hospital pharmacy service remains to be an issue that needs to be solved. Some constraints need to be analysed to get a better insight about the factors involved in these constraints.
Objective: To analyze the factors affecting the waiting time in pharmacy services using the Theory of Constraint (TOC).
Methods: This was an observational study which was conducted by following the hospital pharmacy service in 133 drug prescriptions and 19 compounded drug prescription processes.
Results: The constraint that caused the preparation time took so long and caused the delay to happen are the man, material, method, machine, and time constraints.
Conclusion: Based on the analysis of the pharmacy installation service path, the implications that can be used are to finish the revision of the operational standard procedures, add the procurement of blender machines and sealing machines in the next year’s budget plan, prepare a training plan for the pharmacy technicians, and improve the hospital management information system.
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