Introduction
It is generally known that a good system is the important part of an organization. It can make the work life be more convenient and efficient. Obviously, the potential problem that Builders Warehouse is facing is the deficient and chaotic system has brought many problems. Thus the main purpose of this report is to analyse the reason that to design, implement and maintain a single new integrated system across the whole organization will be the most important thing to be considered.

2. Reasons
2.1 Different need of information
It’s important that managers in different level need different information to accomplish their duty. The sources of information have two types-internal information sources and external information sources. Internal information source can be cash budget, cash flow statement which can reflect the situation of a organization more directly. External sources can be government policy, market trend, customer behaviour that outside of the organization but can effect the situation of the organization. There are three levels of management-Strategic,Tactical and Operational.
Strategic managers are the most senior managers within an organization. For example, brothers James and Peter Stewart are strategic managers of BW. These managers are involved with formulating strategies, setting organizational goals and objectives for the company. Any decisions made by strategic managers are likely to affect the whole organization. Decision-making will be very unstructured in that they often have to use their own judgement when making decisions. Thus managers in this level will need the information of profitability, investment and market trends. So Cash Budget, Trading,Profit and Loss Account and marketing researches will be the resources of informations they need.
Tactical managers are middle management and these managers are responsible for