Local Road Management Manual 134 3. Quantity Calculation The end objective of Quantity Calculation is to come up with the Bill of Quantities (BOQ), which is the official list of work items to be paid under the contract. This is the pay item for each scope of work upon which the contractor shall base its bid. Sample quantity calculation templates are shown in Annex 4A in this Manual. The following items are considered in the quantity calculation: a. Work Items. The scope of works for the road project will be identified and broken down into component work items. These work item shall conform with the DPWH Technical Specifications; b. Construction Method. The most applicable and cost-effective construction method will be determined and studied. Sequencing of activities per work item will be formulated resulting to the size and composition of work crews, the type and number of equipment, the construction materials requirements and the duration of each activity involved, and number of unworkable days due to weather condition will be determined; c. Production Rates. The production rates of labor and equipment for each item will be established taking into consideration the foreseen constraints, obstruction and other impediments encountered in project implementation; materials source should also be considered in the determination of equipment utilization/ output. d. Construction Schedule. A construction schedule for the project will be formulated considering the quantities, production progress rates, sequence and time frame of activities, to include unworkable days due to weather condition; and e. Field Operations. Based on the scheduled progress and production rates, a detailed analysis of the field operation for each work item will be made. There are three (3) schedules arising from the conduct of quantity calculation of the implementing agency. These quantity schedules are the following (see sample forms that are attached as an annex to this