Material issues that often occur in the implementation of the bridge project is delays in ordering materials as well as materials come how the storage process, including planning for material storage warehouse. The use of the material in the bridge construction project is one of the most important parts that have a fairly large percentage of the total cost of the project, therefore the use of good management techniques and appropriate materials to buy, store, distribute and count the use of construction materials becomes very important. Also if taxes is added in the calculation the total variance will be 13.82% of the standard cost.Construction projects in the field of civil engineering, particularly concrete bridge project is complex and involves a lot of merging and combining resources are diverse, so it requires a material management plan specifically can manage materials in construction projects. If the calculation considered the indirect cost, the total variance will be 18.90%. The total variance of cost and labour price is 36.03% againsts standard cost and labour price. Labour cost variance is about 62.01% againsts standard labour cost. The calculation of variance from material price revenled that 0.38%, material quantity variance 19.04% and the total amount of material price variance is 18.60% in relation to standard material cost.
The total amount of material quantity or use variance can be calculated by multiplying the material quantity variance with the standard material price per item. Material quantity or use variance is the differences that happened because the company uses the material more or less quantity than standard quantity in the production process. The total bought of material price variance can be calculated by multiplying (unit) item per item material price variance with the actual quantity. The difference happened because by the reality that the company bought material higher or lower price than the standard material price. The material price variance is calculated is caused by comparing real material price with the standard ones. Standard cost is the cost that calculated based on the quantity of work items multiplied by coefficient of BOW and furthes analysis multiplied again by standard price from city government of public labour 2004.
Real cost is the cost of material and labour that actually paid by the company. Comparing or to find the differences between actual and standard cost in the term of accounting is known as variance analysis. Abstract In construction businesses, it is important to understand the differences between standard costs and the actual costs.
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