MIS Concepts & Design




                    by

              Seema Sirpal
     Delhi University Computer Centre
Information is Critical

      The information we have
      is not what we want,
      The information we want
      is n...
Information is a Resource

  It is scarce
  It has a cost
  It has alternative uses
  There is an opportunity cost factor
...
Why need Information?


 To ensure effective and
 efficient decision - making
 leading to prosperity of the
 Organisation.
What is MIS?

Short for Management Information System –

MIS   refers broadly to a computer-based
system that provides man...
What is MIS?
       Right Information
       To the right person
       At the right place
       At the right time
      ...
Management Information System
The three sub-components
Management, Information and System
- together bring out the focus c...
The Concept of MIS
                               Judgement /        Skill /      External
       Processing Logic        ...
Why MIS? It’s Role


Increased Business & Management Complexities
Increased Business Complexities


   Technological Revolution
   Research & Development
   Explosion of Information
Increased Management Complexities

  Management Science Technologies
  Decision-making
  Onset of Computers
Functional Uses of MIS
Enhance :
  Quality of our operations
  Quality of our services

We achieve :
  Efficiency
  Transp...
Strategic Uses of MIS

 Precise development of strategies,
 planning, forecasting and monitoring
 Problem solving
 Decisio...
Historic Development
The concept of MIS has changed substantially over the
years.

In the 50’s and 60’s, the management sa...
Historic Development
 In the 70’s, there was a discernible shift from data to
 information. The focus was not on data but ...
Historic Development
In the 70’s the top management relied on the staff of EDP
& MIS to supply the necessary information.
...
Historic Development

The information and decision hungry managers of 80’s saw a
huge potential in the expert systems as a...
Historic Development
The EDP targeted the operational level of management.


The MIS/DSS/KBS target the middle management....
Historic Development                                                 KS/ES
                                               ...
Historic Development
 EDP   -   Focus on Data
 OAS   -   Focus on Communication
 MIS   -   Focus on Information
 DSS   -  ...
Characteristics of MIS

                              Management
          Computer            Accounting
          Scienc...
Typical MIS Systems
  Classification through functional disciplines

               Production Finance           Personnel...
Organisational Systems & MIS
          Classification of Management


            Strategic
                             T...
Organisational Systems & MIS

    right information in right time at right   level
Operational Level – accuracy & timeline...
Organisational Systems & MIS

     Mapping organisational level and
                structure
          into the design of...
The Technology Component


 Information Technology (IT) has changed the             way
 organisations function and carry ...
The Technology Component
                                        Computer Hardware
       CPU
   Arithmetic Logic
        ...
The Technology Component
                            Software Categories


         Application Software


          Syste...
The Technology Component
                                     Data Communication
Data Communication consists of

  Data Pr...
Database Technology


 At the heart of the Information Systems
 of an Organisation is the central
 repository of Organisat...
Databases
  Data - raw facts/details

  DATABASE- A shared collection of logically related data.
  Models real-world enter...
Databases


 Database Management System (DBMS):
 large software package designed to store and
 manage databases
Databases are everywhere:
Your wallet is full of DB records

      Driver’s license
      Credit cards
      Gym membershi...
Why We Need DBMS?
  There is an information explosion in
  today’s society
     Need to keep accurate records

  Advantage...
Traditional Approach
  Applications developed in an ad-hoc and
  opportunistic manner
  Data requirements for applications...
Files Dedicated to Application
Programs
     reservation    loan data          overdue
     data                          ...
Database Approach
  Centralization of information
  management
  Data shared by different groups of users
  and applicatio...
Data Sharing in a Database
Environment
       reservation          loan data               overdue
       data            ...
Interacting with a Database
                  DBMS

                 Database




   Application
   Programs
             ...
Advantages
  Sharing of data
  Enforcement of security
  Enforcement of development and
  maintenance standards
  Reductio...
3-levels Architecture

     EXTERNAL LEVEL
      (individual view)   VIEW 1      VIEW 2




     CONCEPTUAL LEVEL         ...
Complete DBMS

    Hardware
    Software
      Utilities
    Data
    Users
    Procedures
Hardware
  The actual computer system used for keeping
  and accessing the database.

  Large organization usually has a n...
Software
  The actual DBMS.
    Allows the users to communicate with the
    database.
    Controls access
    Includes ut...
Data
 The database should contain all the data
 needed by the organization.
 Emphasis is on the relevant data pertaining
 ...
Data continued…
  For each attribute, the set of possible values that the
  attribute can take is called the domain of the...
Users
 Each type of user needs different software capabilities:

    The database administrator (DBA) is the person or
   ...
Procedures
  An integral part of any system is the set of
  procedures that control the behavior of the
  system.
     The...
Data Models
  Models generally allow people to
  conceptualize an abstract idea more
  easily
    Model airplanes
    Mode...
Classification of DBMS
     1.   Classical DBMS

               •    Hierarchical
               •    Network
            ...
Data Models continued…
  The Relational Database Model:
    Relational database management systems,
    where all data are...
Object Oriented Database -
OODBMS

  Handle big and complex data that relational databases
  could not.

  Joining of obje...
Object Oriented Database -
OODBMS
Object Relational - ORDBMS
  RDBMS extended to include Object Oriented concepts
  and structures.
  Handle new types of da...
ACID properties

  ACID properties are an important concept for
  databases. The acronym stands for Atomicity,
  Consisten...
ACID properties
  Atomicity guarantees that one account won't be debited
  if the other is not credited as well.

  Consis...
MIS Design



                Systems’ is of
 The Concept of ‘

 pivotal importance in   MIS
What is a System?

  Systems are created to solve
  problems.
  Systems    approach    is    an
  organized way of dealing...
Defining a System
   A collection of components that work
   together to realize some objective
   forms a system

   Thre...
Fox Example

 Human body - a complete natural
 system.

 National systems - political system,
 economic system, educationa...
System Life Cycle

  Organisational process of developing
  and maintaining systems.

  Helps to establish a system projec...
Phases of SDLC
System Study

  problem identification and project
  initiation
  background analysis
  inference or findings
Feasibility Study

   Workability,
   Meeting user’s requirements,
   Effective use of resources
   Cost effectiveness.
System Analysis

    Specification of the new system
    Functional hierarchy
    Identify Data items
System Design
 preliminary or general design
 Structure or detailed design

 Tools and techniques used for designing:

 Fl...
Coding
 Coding the new system into computer
 programming language.
 Defined procedures transformed into
 control specifica...
Testing
   A test run of the system

     Unit testing
     System testing
     Black box testing
     White box testing
Implementation

    theory is turned into practice
    Parallel run
    Pilot run
    User training
Maintenance

    The review of the system is done for:

        knowing the required changes or
        the additional req...
Information System & Quality

              ATMs
  Computerised Railway Bookings
       Telephone Network


  We do not ex...
Quality


  “Quality indicates the degree of
 excellence of a product or service”
What is Software Quality?



  Ability of a Software to be fit
  for its purpose.
Quality Factors
       Reliability
       Correctness
       Maintainability
       Security
       Reusability
       Por...
Management Role in Software
Quality Assurance

   Establish & maintain the requirement
   specification
   Establish & imp...
Quality Model
                Quality Factor




Requirements    Design       Coding      Testing
Checklist       Checklis...
Information Security & Control


   I.T and Computers have bought
          ‘Information Age’


  The spread of Internet &...
Information Breach


   Unauthorised reading of data
   Unauthorised modification of data
   Unauthorised destruction of d...
Why break I.T. System Security?


    Revenge
    Money
    Notoriety
    The challenge of doing “IT”
Information Security

    Your future is not secure
    if your information is not secure




    Information Resources ne...
Security Threats


      The External Threats

      The Internal Threats
Security Threats
     The External Threats
        Organisation’s connection
        to Internet




  Corporate          ...
Security Threats
  The Internal Threats
    Passwords                 The
    User Termination
                           ...
We may never be able to
eliminate all the security risks




But we can make it very very
hard for them to do so.
Implement short term. Plan long-term.
Mis
Mis
Mis
Mis
Mis
Mis
Mis
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Mis

  1. 1. MIS Concepts & Design by Seema Sirpal Delhi University Computer Centre
  2. 2. Information is Critical The information we have is not what we want, The information we want is not the information we need, The information we need is not available.
  3. 3. Information is a Resource It is scarce It has a cost It has alternative uses There is an opportunity cost factor involved if one does not process information
  4. 4. Why need Information? To ensure effective and efficient decision - making leading to prosperity of the Organisation.
  5. 5. What is MIS? Short for Management Information System – MIS refers broadly to a computer-based system that provides managers with the tools for organizing, evaluating and efficiently running their departments.
  6. 6. What is MIS? Right Information To the right person At the right place At the right time In the right form At the right cost
  7. 7. Management Information System The three sub-components Management, Information and System - together bring out the focus clearly & effectively. System emphasizing a fair degree of integration and a holistic view; Information stressing on processed data in the context in which it is used by end users; Management focusing on the ultimate use of such information systems for managerial decision making.
  8. 8. The Concept of MIS Judgement / Skill / External Processing Logic Intution Experience Environment Computers Decision Intelligence Design Choice Data Infor- Human Beings Data mation Decision Making Data Database Decision Implementation MIS Performance Monitoring / Feedback
  9. 9. Why MIS? It’s Role Increased Business & Management Complexities
  10. 10. Increased Business Complexities Technological Revolution Research & Development Explosion of Information
  11. 11. Increased Management Complexities Management Science Technologies Decision-making Onset of Computers
  12. 12. Functional Uses of MIS Enhance : Quality of our operations Quality of our services We achieve : Efficiency Transparency Speedy Decision making
  13. 13. Strategic Uses of MIS Precise development of strategies, planning, forecasting and monitoring Problem solving Decision-making Separate work from location
  14. 14. Historic Development The concept of MIS has changed substantially over the years. In the 50’s and 60’s, the management saw the potential of computers to process large amounts of data speedily and accurately. The departments that were involved with such activities were known as Electronic Data Processing (EDP) departments. The focus of EDP was Record Keeping e.g. accounting data – Payroll data.
  15. 15. Historic Development In the 70’s, there was a discernible shift from data to information. The focus was not on data but on the analysis of Organisation data. There was a shift in the philosophy. Such a concept came to be widely known as ‘Management Information System’. right information in right time to right people
  16. 16. Historic Development In the 70’s the top management relied on the staff of EDP & MIS to supply the necessary information. The 80’s saw the Personal Computer (PC) revolution. The Personal Computer & the desk-top metaphor changed the picture completely. The biggest pay-off for such direct use was the “what-if” analysis capability. This led to the emerge of Decision Support Systems (DSS).
  17. 17. Historic Development The information and decision hungry managers of 80’s saw a huge potential in the expert systems as a result of spectacular growth in the Artificial Intelligence area. Combined with DSS philosophy the expert systems could supply a superior class of managerial information support, known as Knowledge Based Systems (KBS).
  18. 18. Historic Development The EDP targeted the operational level of management. The MIS/DSS/KBS target the middle management. Attempts were made to provide information to top management as well, known as Executive Information System (EIS).
  19. 19. Historic Development KS/ES AI Artificial Intelligence Knowledge ESS / Expert System Executive Support System DSS Decision Support System MIS Management Information System OAS Office Automation System TPS Transaction Processing System 1950s 21st Century
  20. 20. Historic Development EDP - Focus on Data OAS - Focus on Communication MIS - Focus on Information DSS - Focus on Decision Support EIS - Focus on Decision Support for Top Management ES - Focus on Consultation AI - Focus on self-learning / thinking systems
  21. 21. Characteristics of MIS Management Computer Accounting Science Management Science / Theory MIS Operations Research Behavioural Sciences Organisation Theory A multi-disciplinary Subject
  22. 22. Typical MIS Systems Classification through functional disciplines Production Finance Personnel Marketing Strategic New Plant Alternative Welfare Competitor Location Financing Policy Survey Tactical Production Variance Performance Advertising Bottleneck Analysis Appraisal Operational Daily Payroll Leave Sales Scheduling Records Analysis
  23. 23. Organisational Systems & MIS Classification of Management Strategic Top decisions Tactical Middle decisions Operational Operational decisions
  24. 24. Organisational Systems & MIS right information in right time at right level Operational Level – accuracy & timeliness of information collection and dissemination is important Tactical & Strategic Level – relevance is the watch-word Efficiency at Operational level Effectiveness at tactical & strategic level
  25. 25. Organisational Systems & MIS Mapping organisational level and structure into the design of any MIS is very important for its successful implementation.
  26. 26. The Technology Component Information Technology (IT) has changed the way organisations function and carry out their activites. Computers have fundamentally changed MIS from an abstract concept to concrete system that provide efficiency and transparency in the Oraganisation.
  27. 27. The Technology Component Computer Hardware CPU Arithmetic Logic Unit Primary Storage Control Unit Data Bus Address Bus Control Bus Input Output Secondary Devices Devices Storage
  28. 28. The Technology Component Software Categories Application Software System Software Hardware
  29. 29. The Technology Component Data Communication Data Communication consists of Data Processing & Transactions Transaction is a fundamental organisational function Data Transmission Transmission : Media, networks and paths Processing :Getting/delivering the right message to the right receiver Control : Routing messages, structure maintenance.
  30. 30. Database Technology At the heart of the Information Systems of an Organisation is the central repository of Organisation Data.
  31. 31. Databases Data - raw facts/details DATABASE- A shared collection of logically related data. Models real-world enterprise. Entities students, courses, instructors Relationships Suman is currently taking MB101 Vijay is currently taking MB102 Abhishek is currently taking MB103 but took MB101 last semester
  32. 32. Databases Database Management System (DBMS): large software package designed to store and manage databases
  33. 33. Databases are everywhere: Your wallet is full of DB records Driver’s license Credit cards Gym membership Individual checks Rs. 500 notes (w/serial numbers) Maybe even photos (ids on back)
  34. 34. Why We Need DBMS? There is an information explosion in today’s society Need to keep accurate records Advantages of using a DBMS fall into three main categories: Proper maintenance of the data Providing access to the data Maintaining security of the data
  35. 35. Traditional Approach Applications developed in an ad-hoc and opportunistic manner Data requirements for applications derived independently Data files developed for individual applications Application programs are data dependent
  36. 36. Files Dedicated to Application Programs reservation loan data overdue data letters reservation loan overdue loans program program program reservation loan book person file file file file
  37. 37. Database Approach Centralization of information management Data shared by different groups of users and application programs Integrity constraint handling Advanced facilities for backup and recovery
  38. 38. Data Sharing in a Database Environment reservation loan data overdue data letters reservation loan overdue loans program program program DATABASE MANAGEMENT SYSTEM book reserv loan ation person
  39. 39. Interacting with a Database DBMS Database Application Programs End Users
  40. 40. Advantages Sharing of data Enforcement of security Enforcement of development and maintenance standards Reduction of redundancy Avoidance of inconsistency across files Maintenance of integrity Data independence
  41. 41. 3-levels Architecture EXTERNAL LEVEL (individual view) VIEW 1 VIEW 2 CONCEPTUAL LEVEL Structural (community view) Properties & Constraints INTERNAL LEVEL Logical (storage view) Representation of Stored Records
  42. 42. Complete DBMS Hardware Software Utilities Data Users Procedures
  43. 43. Hardware The actual computer system used for keeping and accessing the database. Large organization usually has a network with a central server and many client programs running on desktops. Smaller organizations may have the DBMS and its clients reside in a single computer.
  44. 44. Software The actual DBMS. Allows the users to communicate with the database. Controls access Includes utilities Report writers Application development tools Examples of DBMS software Microsoft SQL Server Oracle Corporation Personal Oracle™ IBM DB2™
  45. 45. Data The database should contain all the data needed by the organization. Emphasis is on the relevant data pertaining to one or more objects or entities. Entity: a thing of significance about which information needs to be known. The characteristics that describe or qualify an entity are called attributes of the entity.
  46. 46. Data continued… For each attribute, the set of possible values that the attribute can take is called the domain of the attribute. The domain of the date of birth would be all the dates that might be reasonable in the student body. No date in the 1700s would be expected. Undergraduate class levels would probably be restricted to Part I Part II Part III No other values would be allowed.
  47. 47. Users Each type of user needs different software capabilities: The database administrator (DBA) is the person or group in charge of implementing the database system within the organization. The end users are the people who sit at workstations and interact directly with the system. The application programmers interact with the database by accessing the data from programs written in high-level languages such as Visual Basic etc.
  48. 48. Procedures An integral part of any system is the set of procedures that control the behavior of the system. The actual practices the users follow to obtain, enter, maintain, and retrieve the data. For example, in a payroll system, how are the hours worked received by the clerk and entered into the system? Exactly when are monthly reports generated and to whom are they sent?
  49. 49. Data Models Models generally allow people to conceptualize an abstract idea more easily Model airplanes Model homes A data model is a way of explaining the logical layout of the data and the relationship of various parts to each other and the whole. Different data models have been used throughout the years.
  50. 50. Classification of DBMS 1. Classical DBMS • Hierarchical • Network • Relational 2. New Directions • Extended Relational • Object-Oriented • Distributed
  51. 51. Data Models continued… The Relational Database Model: Relational database management systems, where all data are kept in tables or relations. More flexible & easy to use. Almost any item of data can be accessed more quickly than the other models. Retrieval time is reduced so that interactive access becomes more feasible. This is what is referred to as Relational Database Management Systems (RDBMS)
  52. 52. Object Oriented Database - OODBMS Handle big and complex data that relational databases could not. Joining of object-oriented programming with database technology, which provides an integrated application development system.
  53. 53. Object Oriented Database - OODBMS
  54. 54. Object Relational - ORDBMS RDBMS extended to include Object Oriented concepts and structures. Handle new types of data such as audio, video, and image files that relational databases were not equipped to handle. Advantages of ORDBMS it allows organizations to continue using their existing systems, without having to make major changes. it allows users and programmers to start using object-oriented systems in parallel.
  55. 55. ACID properties ACID properties are an important concept for databases. The acronym stands for Atomicity, Consistency, Isolation, and Durability. A single logical operation on the data is called a transaction. Example : transfer of funds from one account to another. The ACID properties guarantee that such transactions are processed reliably.
  56. 56. ACID properties Atomicity guarantees that one account won't be debited if the other is not credited as well. Consistency a transaction can't break the rules, or integrity constraints, of the database. If an integrity constraint states that all accounts must have a positive balance, then any transaction violating this rule will be aborted. Isolation This means that no operation outside the transaction can ever see the data in an intermediate state; Durability refers to the guarantee that once the user has been notified of success, the transaction will persist, and not be undone.
  57. 57. MIS Design Systems’ is of The Concept of ‘ pivotal importance in MIS
  58. 58. What is a System? Systems are created to solve problems. Systems approach is an organized way of dealing with a problem.
  59. 59. Defining a System A collection of components that work together to realize some objective forms a system Three Major Components
  60. 60. Fox Example Human body - a complete natural system. National systems - political system, economic system, educational system
  61. 61. System Life Cycle Organisational process of developing and maintaining systems. Helps to establish a system project plan.
  62. 62. Phases of SDLC
  63. 63. System Study problem identification and project initiation background analysis inference or findings
  64. 64. Feasibility Study Workability, Meeting user’s requirements, Effective use of resources Cost effectiveness.
  65. 65. System Analysis Specification of the new system Functional hierarchy Identify Data items
  66. 66. System Design preliminary or general design Structure or detailed design Tools and techniques used for designing: Flowchart Data flow diagram (DFDs) Data dictionary Structured English Decision table Decision tree
  67. 67. Coding Coding the new system into computer programming language. Defined procedures transformed into control specifications Programming phase - computer instructions.
  68. 68. Testing A test run of the system Unit testing System testing Black box testing White box testing
  69. 69. Implementation theory is turned into practice Parallel run Pilot run User training
  70. 70. Maintenance The review of the system is done for: knowing the required changes or the additional requirements studying the performance If a major change to a system is needed, a new project is set up to carry out the change. The new project will then proceed through all the above life cycle phases.
  71. 71. Information System & Quality ATMs Computerised Railway Bookings Telephone Network We do not expect them to fail!
  72. 72. Quality “Quality indicates the degree of excellence of a product or service”
  73. 73. What is Software Quality? Ability of a Software to be fit for its purpose.
  74. 74. Quality Factors Reliability Correctness Maintainability Security Reusability Portability User-friendliness
  75. 75. Management Role in Software Quality Assurance Establish & maintain the requirement specification Establish & implement a process for developing the Software Establish & maintain an evaluation process
  76. 76. Quality Model Quality Factor Requirements Design Coding Testing Checklist Checklist Checklist Checklist Quality Factor throughout the Software Life Cycle
  77. 77. Information Security & Control I.T and Computers have bought ‘Information Age’ The spread of Internet & relative ease of access made easier ‘Information Breach’
  78. 78. Information Breach Unauthorised reading of data Unauthorised modification of data Unauthorised destruction of data
  79. 79. Why break I.T. System Security? Revenge Money Notoriety The challenge of doing “IT”
  80. 80. Information Security Your future is not secure if your information is not secure Information Resources need to be guarded, protected and controlled
  81. 81. Security Threats The External Threats The Internal Threats
  82. 82. Security Threats The External Threats Organisation’s connection to Internet Corporate Internet Firewall Network Private Access Public Access
  83. 83. Security Threats The Internal Threats Passwords The User Termination Greatest Special Privilege IDs Security Access Reviews Authorisation levels Threats User information Come Routine maintenance from Software updates within Virus checking / checks Physical considerations Audit Trails
  84. 84. We may never be able to eliminate all the security risks But we can make it very very hard for them to do so.
  85. 85. Implement short term. Plan long-term.
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