Absorption costing, is also termed as Traditional or full costing method , it includes everything that is a direct cost in producing a good in its cost centre.

 A direct cost is a cost that can be completely attributed to the production of specific goods or services.

Cost may be classified as fixed cost and variable cost.  

Employees who are involved directly in to the production activity are direct labor. The cost of labor is directly associated to a specific unit or cost or product.

Inventories may be classified as raw material, work in progress and finished goods. Goods which is partly finished is considered as goods in progress or work in progress. 

This is the situation in which the overheads applied to a product is less than the actual overhead incurred. This results in the overheads having a debit balance.

A predetermined rate of overhead is calculated by dividing the estimated overhead cost by the estimated number of hours. It refers to the estimation hence actual overheads may be different from the charged overheads.

Wastage can be classified as normal waste and abnormal waste. There is a part of input which constitutes as waste in the normal course of production. This kind of waste is considered as normal waste, the value of which should be recorded as part of cost of production.

A flexible budget requires careful study and classification of expenses into Fixed, semi-variable and variable expense. A flexible budget is a budget which changes with the change in level of activity. 

A period cost is any cost that cannot be capitalized into prepaid expenses, inventory, or fixed assets. A period cost is more closely associated with the passage of time than with a transactional event.

In accounting, a standard costing system is a tool for planning budgets, managing and controlling costs, and evaluating cost management performance. A standard costing system involves estimating the required costs of a production process.

All costs are controllable in long run. In long run all costs are controllable because of the time period. Controllable costs are those cost which can be controlled if taken care of. 

Expected or attainable Standards: This standard is a compromise between extremes of normal standard & extremes of idle standard. The main features of these standards are:  (a) for the purpose of providing for operating inefficiencies which are unavoidable, these standards are set; (b) conditions prevailing in the period for which use of standards are made are taken into account; (c) for the purpose of evaluation of performance, these standards provide best criterion & are very realistic in nature; (d) as all requirements of good standards are fulfilled by these standards, i.e., these standards are consistent, are attainable, realistic & provide incentive for improvement; they have got the maximum usage. Level of performance expected in these standards is higher than level of performance expected in normal standard. 

A standard cost is a pre-determined or pre-established cost to make a unit of finished product.

Direct labour rate variance is the difference between the standard rate of labour and the actual labour rate on standard ouput/hour.

The following preliminaries are to be carefully considered before introducing standard costing system in any firm:

A. Setting up or Establishment of Cost Centres;

B. Classification and Coding of Accounts;

C. Types of Standards; and

D. Setting up or Establishment of Standards.

Product cost includes direct materials, direct labor, and overhead. These are the costs that are included in the cost of goods sold and inventory. Only these costs can be included in the inventory.

 Companies that produce identical units such as lumber, tile, brick manufacturers, cereal makers, or pharmaceutical companies utilize process costing. Generally, companies utilize process costing when: Mass production of identical products. Output of products is of low value.

In every production activity, a predetermined % is considered as normal loss. If the actual loss is more than the predetermined loss, difference is considered as abnormal loss. 

Packing material is the cost of material which is incurred to bring the product in salable condition. 

Economic order quantity is the ordering quantity a firm should add to the inventory with each order to minimize the cost of total inventory such as inventory holding cost, ordering cost and shortage cost.

Inventory level of an item which signals the need for placement of a replenishment order, taking into account the consumption of the item during order lead time and the quantity required for the safety stock. 

ABC analysis is a technique of inventory management. In this method, inventory is categorized in to A, B and C class depending on their importance. 

Sales is completed only when the legal title of the goods passed to the buyer. 

The sunk cost is that cost which has already been incurred and can not be recovered. Sunk cost is considered irrelevant in future decision making as this has already been incurred.