Presentation on theme: "Business-related Information Systems l EIS - Executive Information Systems l MIS - Management Information Systems l Decision Support Systems l Transaction."— Presentation transcript:
Business-related Information Systems l EIS - Executive Information Systems l MIS - Management Information Systems l Decision Support Systems l Transaction Processing Systems
Transaction Processing Systems l The lowest level of information system l Used by businesses to record transaction information l Transactions include things like booking airline tickets, purchasing goods or services
Management Information Systems l A step up from TPS l This type of systems is used for routine reporting l Reports are used to monitor and control normal business activities
Decision Support Systems l Similar in some ways to MIS l Used to solve unusual problems, and problems that fall outside the capabilities of the MIS
Executive Information Systems l The King of the Hill!! (Topmost systems) l High-level systems designed to provide Senior Management with information on general trends in business activities rather than the intimate details l Used to help S.M.. formulate business strategies, and plan for the future
Characteristics of decisions and information needs when ascending the diferent business levels. l Less structured problems and decisions l Greater need for summarised information l Greater need for external information l Longer time horizion
Transaction Processing Systems l The lowest level of Business system l Provides raw data used in processing in EIS, MIS and DSS l TPS are important for a business. They manage the data that keeps the business going, e.g. Airline ticket bookings, etc.
Transaction Processing Systems (contd) l TPS accept input related to a transaction event, process it, and produce output l The primary users of a TPS are staff at the Operational, or lowest-level, of a business
Structure of a typcial TPS
What is a Management Information System? l A MIS provides Managers with reports on an organisations performance - both past and present. l MIS server Managers by helping them monitor actual business performance, and predict future performance.
General Properties of a MIS? l Used to help Managers track current performance, and predict future performance l Based upon underlying TPS. Transaction data is compressed by summarisation, and presented in long reports. l Reports are produced on a regular basis answering routine, structured questions
General Properties of a MIS (contd) l MIS serve Managers interested in Weekly, Monthly, and/or Yearly resuts, not day-to-day. l Data is provided from internal company sources only. l Uses simple calculatory routines such as summaries and comparisons, not sophisticated statistical analysis
General Properties of a MIS (contd) l Not very flexible. Reports and data are structured according to the original MIS design, this generally cannot be easily changed to provide different data. l Development of a MIS requires a lengthy analysis and design process, typcially in the order of 1 to 2 (or more!) years l Less graphically-oriented than EIS
Dynamics of a MIS l Inputs: –Summary of Transaction Data –High-volume data –Simple models l Processing: –Routine Reports –Simple Models –Low-level analysis
Dynamics of a MIS (contd) l Outputs: –Summary and Exception Reports Typical MIS Users: Professionals and Staff Managers
Structure of a typical MIS
Decision Support Systems (and more!)
Decision Support Systems l Definition: A DSS is a coherent system of computer based technology used by managers as an aid to their decision making in semi-structured tasks. l Conceptually, DSS and MIS overlap in many aspects, but generally: –MIS are used to produce routine reports –DSS use more sophisticated analysis and data modelling tools to solve semi-structured problems
Differences between DSS and MIS
The characteristics of a DSS l Structured and semi-structured decisions l Used by managers at different levels l Used both by groups and individuals l Supports a variety of decision styles and processes l It has adaptability and flexibility l Ease of use l Its based on effectiveness and not effciency
Components of a DSS l DSS Database - data from internal TPS. Unlike MIS, this can contain data from inventory, production, and accounting sources l Model Base - Analytical tools used by the DSS. These include built-in spreadsheeting, statistical analysis, and simulation
Components of a DSS (contd) l DSS software system - program to allow easy interaction between users of the system and the DSS database and model base
DSS - Questions l Where does it obtain its data from? l What does it do with the data? l What Management and Business problems does the system solve? l What difference does a DSS make for a firm?
DSS - Answers l From the organisations internal transaction files l Spreadsheet modelling, What-If scenarios, Regression Analysis, Graphical projection of performance l Monitoring and controlling a production process. Frees Managers time to control production
DSS - Answers (contd) l Provides rapid access to up-to-date information. Also aids quick reaction to unanticipated problems that occur
Structure of a generic DSS
Tools used in a DSS l What-If analysis tools (found in most spreadsheets) –What-if analysis allows users of a system to quickly calculate and display the results of many combinations of input values in a model.
Example of a What-If table l Formula: +B1-B2
Projection l Projection tools typically use historical data gathered by the TPS and compressed by the MIS l This data is used to project future trends based upon past and present information about market behaviour l Generally makes use of the What-If capabilities in a DSS
Regression Analysis l Advanced routines to predict values based upon relationships in existing data. l Seeks to analyse how a single dependant variable is affected by the values of one or more independent variables.
Regression Analysis (contd) l Example: –Several factors may contribute to an athletes performance: Age, Sex, Height, Weight. Regression apportions shares in the performance measure to each of the factors based up a set of performance data. l Regressive results can be used to try and predict the performance of a new, untested athlete.
Cash Flow analysis l Important to know: – what incomings and outgoings there are in a company for planning purposes –When do they take place? –the lead time between incurring an expense and paying for it –the lag time between making a sale and collecting money from debtors
What problems does the DDS solve? l Monitoring and controlling of production processes l Better quality control of final product l Better planning capabilities l Faster reaction times
What differences does it make to the company? l Increase in the number of alternatives examined l Better understanding of the business l Improved communication and control l Lowering of costs l Improved efficiency l Improved productivity l Makes better use of data resources l Better decisions
Examples of DSS l American airlines: for pricing decisions and choosing air routes l IBM: for determining routing for repair people l Texas oil and gas: for evaluating potential drill sites l National Gypsum: corporate planning and forecasting.
Executive Information Systems
l Definition: An EIS is a software product, front-ended by a user friendly terminal and software interface which electronically provides executives (senior management) with rapid and relaible access to information regarding key areas of the business.
General Properties of an EIS l Used for strategic business planning l Relatively long time-frame considered l Unstructured and open-ended (many variables can be considered) l For accurate results EIS require information from inside and outside the business
General Properties of an EIS l Graphically oriented to provide readily understandable views of complex data l Tailored to suit an executives decision making style l provides rapid access to current information and filters and tracks critical data l Its major activity is information scanning and evaluation, it deals mainly with the intellegence phase of decision-making.
Benefits of executive information systems l Improved financial and operational control l Enhances business problem solving l (eg British Airways during the 1986 libyan crisis). l Helps in the identification of new opportunities (eg tour operators use it to identify new holiday destinations) l Increases IT awareness among senior management.
What are the information needs of executives l Three classical criteria: Timeliness, accuracy and relevance. l Should focus on the critical success factors: –The limited number of areas in which results, if satisfactory, will ensure successful competitive performance for the organisation.
What are the information needs of executives (contd) l Five main types of information based on CSF: –Key problem narravtives (highlights overall performance, key problems and causes of problems) –Highlight charts (highlight areas of concern) –Top-level financial displays –Key factors (displays measures of key performance indicators) –Detailed KPI responsibility reports (performance reports on areas critical to the success of the company)
Types of EIS l For focusing on executive communications and office work, e.g. e- mail, document handling, scheduling l Better interface for existing corporate data l For developing elaborate scenarios involving business data
Model of a typical EIS
EIS and corporate planning l EIS are ideal for aiding Executives in planning for an organisation or business –EIS give a good overview of trends in business data that can be used to more accurately determine planning for the future
EIS Graphics Display l Strong graphical element in displaying data l Data is displayed in as simple a form as possible, e.g. line/bar charts etc.. l Colour is often used to provide extra information l From an EIS screen the Manager can usually drill down for more info
Tools and Techniques l Typically the EIS resides on a central computer, e.g. a powerful PC or even mainframe l Executives access the information from a PC on their desktop via a network l The information can be viewed and manipulated on-screen, and printed out on paper
Consolidation of Information l Data is extracted from a number of sources l Outside the company - Customers, News Services, Government l Inside the company - TPS, financial systems, HR, Marketing depts.
EIS Problems and Issues l People –What data do Executives really want? –Changes in Executives data requirements over time –Level of computer skills in the group using the system
EIS Problems and Issues l Organisational –Cost of implementing the system –Changes may be needed to create, install, and use the new EIS system
EIS Problems and Issues l Technology –Retaining compatibility with older Legacy systems –Integrating data from different sources into the new system can be complex. At worst it may need to be typed into the new system –Obsolescence