Under the condition of proper use, carry out material quota mechanism. Each team can only receive materials in batches within the specified limit. If more materials than the limit are taken, analyze the reason, and take timely corrective actions. Keep on improving and optimizing the construction organization design, construction plan and construction deployment. Strictly control the inflow materials, material purchase must be strictly in accord with handing over procedures. Contact the supplier immediately to replace or return unqualified materials during the quality check or damaged materials in the transportation, to