Management Accounting Systems-英国管理会计研究 [2]
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论文字数:3624论文编号:org201406132126253760语种:英语 English地区:中国价格:免费论文
关键词:Management Accounting Systemscompany’s profits英国管理会计管理会计系统constraint management
摘要:This report recommends that managers identify the reason for the falling profits, and look to find out why inventory is building up (are these a symptom of slack demand, or of inefficiencies within the business). Based on these findings a decision as to what further systems are needed can be made.
organisation (Wei, Liu et al. 2002). The TOC states that even though modern managers are still evaluated by labour use, such efficiencies can lead to decisions which harm the organisation rather than help optimise production. This criticism led Goldratt to develop the TOC as an alternative system, identifying ‘constraint’ as a decision relevant concept in the service or production process (Watson, Blackstone et al. 2007).
The central idea to TOC and TA is that each organisation has a specific goal (or a set of specific goals) which can be effected by decision making, better decision making leads to better completion of the goals (Linhares 2009). If one takes the normative assumption of a profit orientated organisation as the maximisation of the owner’s wealth, then the ‘goal unit’ will be the ‘throughput contribution’ (TC) which is similar to the ‘total contribution’ marginal costing (Hansen, Mouritsen 2006). The difference in TA is that ‘throughput contribution’ is defined in the TOC as Sales (S), less total variable cost (TVC) which is he cost of raw materials (not labour). This is placed in the context of two further conceptual mechanisms, Investment (I), which refers to money tied up in the system in terms of inventory and work in progress, as well as with machinery and buildings and the like, the second is Operating Expense (OE) which is the money spent by the system on generating goal units, but not the cost of raw materials, so items such as utilities and wages (Davies, Mabin et al. 2005).
This delineation of the costs of production and services allows the processes to be viewed in terms of a number of optimization questions. Typically firms need to ask themselves how throughput (TC) can be increased, how Investment (I) can be reduced and how Operating Expense (OE) can be reduced. These questions in turn will affect the Net Profit, Return on Investment, Productivity and Investment in the following ways;
Therefore it can be argued that the maximisation of throughput contribution is key to the maximisation of all of the above key performance indicators. The firm can seek to maximise TC by optimising a number of aspects of the production processes. There are five common steps associated with this process;
Identify the system constraints
Exploit the system constraints
Subordinate everything else to the decisions made
Elevate the system’s constraints
Restart the process if a constraint has been broken
The following example illustrates the process.
Company A has two workers and produces two products (Workers, A,B, Products X & Y). Product Y Requires ten minutes of Worker A’s time, and product X requires fifteen minutes. Potential demand for X is 100 units, for Y is 50 units. If the total time available to worker A is 2000 minutes per week Worker A is not a constraint as the total time to manufacture both products is equal to the total available time (15 minutes x 100, 10 minutes x 50 = 2000 minutes). Worker B also works on the two products but takes 15 minutes on both products (15 minutes x 100, 15 minutes x 50 = 2250), assuming that Worker B has the same maximum time available (2000 minutes) there is a constraint around Worker B. Thus the constraint has been identified.
Step two seeks to exploit the constraint. Concentrating on Worker B as this is where the constraint occur, the exploitation of the constraint means the company
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