管理信息系统的系统分析.ppt
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1、,Data class,Operation plan,Financial plan,Product forecasts,production process,Inventory control,Sales management,Dispatch,Operations sequence,Material Requirement,Production Capacity Planning,Product design & development,Cost accounting,Employing plan,Sales,Accounting,Shipment,Ordering service,Fina
2、ncial,Plan,Production,Inventory stock,Materials list,Part requirement,Task form,Material stock,Staff,Cost,Order goods,Sales region,Client,Technological process,Materials supply,C,U,U,U,U,U,U,U,U,U,U,U,U,U,U,U,U,C,C,C,C,C,U,U,U,U,U,U,U,U,U,U,C,C,C,C,C,C,U,U,U,U,U,U,U,U,U,C,U,U,U,U,Equipment load,U,U,
3、U,U,U,C,U,C,Achievement evaluation,Check1: No null row/column,Check2:Each column can have only one C,Check3:Each column have one U least,Data class,C U U,Technical preparation,Marketing,Finance and accounting,Personnel,U U U U,C,U U U U,C C U U,U U C U,C C U U,U C U,C U U,U U U C,U U C,U C U,U U C U
4、,U U C,U U U,U C,C U,U U U,Operation plan,Financial plan,Asset size,Product forecasts,production process,Inventory control,Sales region management,Dispatch,Operations sequence,Material Requirement,Production Capacity Planning,Product design & development,Cost accounting,Employing plan,Market analysi
5、s,Financial accounting,Shipment,Ordering service,Achievement evaluation,Financial plan,Plan,Production,Inventory cost,Materials list,Part requirement,Task form,Material stock,Staff,Cost,Order goods,Sales region,Client,Technological process,Materials supply,Equipment load, 定义信息结构 - 划分子系统、确定子系统的实施顺序,4
6、. Subsystem division子系统的划分 BSP method is According to information used and create to dividing subsystems, it try to divide the enterprise process create information and use in a subsystem, and a reduction in the information exchange. The procedure is as follows: BSP方法是根据信息的产生和使用来划分子系统的, 它尽量把信息产生的企业过
7、程和使用的企业过程划分在一个子系统中,从而减少了子系统之间的信息交换。划分子系统的步骤如下:,(1)Make U/C matrix. Using defined functions and data class to make a form of function and data, i.e. U/C matrix, as shown in the table. Rows of the Matrix respect data, and columns represent function, and use letter U (use) and C (create) mean the funct
8、ions use and create data. The intersection superscript C means the data generated by the corresponding function. Marking U means the function using this data class. 作U/C矩阵。利用定义好的功能和数据类作一张功能数据类表格,即U/C矩阵,如表所示。矩阵中的行表示数据类,列表示功能,并用字母U(use)和C (create)表示功能对数据类的使用和产生, 交叉点上标C的表示这个数据类由相应的功能产生,标U的表示这个功能使用这个数据类
9、。,(2) Adjustment function/data class matrix. At beginning class and process data is in random arrangement, U, C in the matrix arrangement is dispersive, will have to be adjusted.调整功能/数据类矩阵。开始时数据类和过程是随机排列的,U、C在矩阵中排列也是分散的,必须加以调整。 First, according to a list of function arrangement, each functional grou
10、ps arrange according to the resources in the life cycle of four stages. Functional groups with the same types of function, such as “business plan” “financial planning” belong to plan group, divided to groups “operating plan”.首先,功能这一列按功能组排列,每一功能组中按资源生命周期的四个阶段排列。功能组指同类型的功能,如“经营计划”、“财务计划”属计划类型,归入“经营计划”
11、功能组。 Secondly, in data arrange this line, making the matrix C closest to the main diagonal line. Because the function group is not absolute, may be appropriately allocate function group without the destruction logic function, make U also close to main diagonal line. After the function of above of th
12、e matrix/figures adjusting, can get the function/data class matrix displayed table below.其次,排列“数据类”这一行,使得矩阵中C最靠近主对角线。因为功能的分组并不绝对,在不破坏功能组成的逻辑性基础上,可以适当调配功能分组,使U也尽可能靠近主对角线。上表的功能/数据类矩阵经上述调整后,得到下表表示的功能数据类矩阵。,(3)Draw functional groups corresponding box, and give a name, this is subsystem, see table below.
13、 画出功能组对应的方框,并起个名字,这就是子系统,见表所示。 (4)Use arrows put down in the box with the U connected, stand for the data flow of between subsystem. For example, data class “plan” create by the operation subsystem, and technical preparation subsystem may use this data class.用箭头把落在框外的U与子系统联系起来, 表示子系统之间的数据流。例如,数据类“计划
14、”,由经营子计划系统产生,而技术准备子系统要用到这一数据类。,In the whole system logic division we should be paid attention to:在整个系统逻辑的划分中要注意的是: Along the diagonal line draw subsystem one after another, can neither overlap, nor miss any data and functions. Small squares division is arbitrary, but it must give all the “C“ element
15、 contains within in a small squares.沿对角线一个接一个地画,既不能重叠,又不能漏掉任何一个数据和功能。 小方块的划分是任意的,但必须将所有的“C”元素都包含在小方块之内。,After divide Subsystems, there are several “U“ stay out the red square, this is the of data connections between subsystems in future, or shared data resources. These use arrow express.子系统划定之后,留在小方
16、块(子系统)外还有若干个“U”元素,这就是今后子系统之间的数据联系,即共享的数据资源。将这些联系用箭头表示。 Use arrows put the U which out of the boxes to connected with subsystem, stand for the data flow of between subsystem. For example, data class “plan” create by the operation subsystem, and technical preparation subsystem may use this data class.
17、用箭头把落在框外的U与子系统联系起来, 表示子系统之间的数据流。 例如,数据类“计划”,由经营子计划系统产生,而技术准备子系统要用到这一数据类。 The direction of arrows means the data class create by a subsystem and will use by another subsystem.,Analysis for MIS 管理信息系统的系统分析,Part one: Understanding of analysis, and the task of system analysis对系统分析的理解和系统分析的任务 Part two: F
18、easibility Analysis可行性分析 Part three: Contents of detailed investigation 详细调查的内容 Part four: Data describe tool (DFD and DD)数据描述工具(数 据流程图和数据字典) Part five: Confirm the new management model, establishing new system logic model or program确定新的管理模 型,建立新系统的逻辑模型或方案,Part one: Understanding of analysis, and th
19、e task of system analysis对系统分析的理解和系统分析的任务,1.The understanding of MIS analysis对管理信息系统的系统分析的理解 System analysis, also called needs analysis, is lead by system planning, and take detailed investigation of system, on the basis of thoroughly understand the original information system, then analyzes, compa
20、re and judgment on all kinds of schemes of new system, complete design the logical model of new system, solve the system “do what“ problem.系统分析,也称为需求分析,是在系统规划的指导下,对系统进行深入详细的调查研究,在充分认识原信息系统的基础上,对新系统的各种方案进行分析、研究、比较和判断,完成新系统的逻辑模型设计,解决系统“做什么”的问题。 System analysis is an important segment of MIS developmen
21、t. Its work quality in largely determines the success or failure of the system. 系统分析是开发MIS的重要环节,其工作的好坏在很大程度上决定了系统的成败。,2. MIS analysiss task管理信息系统分析的任务 MIS analysis mission is: on the basis of have full understanding to the original information system, through the problem identification, feasibility
22、analysis, detailed investigation, systematic analysis, finally complete the logic design of new system or says logical model, solve “do what“ problem. 管理信息系统系统分析的任务是:在充分认识原信息系统的基础上,通过问题识别、可行性分析、详细调查、系统化分析,最后完成新系统的逻辑方案设计或者称逻辑模型,解决“做什么”的问题。,Part two: Feasibility Analysis可行性分析,一、可行性分析的概念和内容,1. The conc
23、ept of feasibility analysis可行性分析的概念 Feasibility analysis is to determine the possibility of MISs success through the needed information technology and the possible investment or cost or the benefits general, and it all according to the problem have definite. 可行性分析是根据确定的问题,通过分析新系统需要的信息技术、可能发生的投资和费用、产
24、生的效益,确定将开发的管理信息系统成功的可能性。 2. The contents of feasibility analysis可行性分析的内容 (1)Feasibility in management: the administrative staffs attitude to application project and the conditions of management. 管理上的可行性:指管理人员对开发应用项目的态度和管理方面的条件。 (2)Feasibility in technology: analysis whether the present software and
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