Job order costing is the only way that companies can appraise the jobs that they are about to take up. In the absence of a job order costing system, companies will not have enough data to ascertain whether or not the job will be profitable. Job order costing system enables a company to make reliable estimates about the monetary values of materials, labor and overheads that will be spent while performing a job. A more efficient job order costing system enables companies to make quotes that are low enough to be competitive and high enough to be profitable.

Over a period of time, a job order costing system becomes a valuable database. This is because there are thousands of jobs that get stored in the system. These jobs can be used by companies as empirical data. This data can be used in multiple ways. One way is related to quotations as listed in the point above. Another use is when companies can conduct in depth analysis into their own efficiency. A job order costing system provides the data that is required to conduct the analysis by product or by function and aids significantly in decision making
Companies can use the job order costing system to find the jobs that they are competitive at and the ones that they are not. This system helps conduct in depth analysis such as cost of materials and even the cost of scrap and rework that has been done in the specific job. This cost information helps the company financially. But it also helps the company to streamline its operations