Chapter Overview — the Roadmap
🧭CENTRAL IDEA Information is critical for effective & efficient decision-making and achieving goals — the chapter covers the roles, types and levels of IS in business.
AREA 1
Role of IS
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AREA 2
General system concepts of IT 5 uses · IT vs IS
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AREA 3
Key elements of IS Data → security
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AREA 4
Types of IS TPS · MSS · DSS · EIS · ES
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AREA 5
Levels of IS Operational · middle · senior
Key Definitions
📘Teal terms = high exam priority
Networks of software & hardware to collect, filter, process, create & distribute data & information.
Application of computers & telecommunications equipment to store, retrieve, transmit & manipulate data.
A set of interacting components operating together to accomplish a purpose.
A collection of people, machines and methods organised to accomplish specific functions.
The planning, environment, control and technology involved in managing information.
Raw, unorganised facts processed into meaningful, useful information for specific purposes.
An electronic filing system that collects & organises data — the core of business IS.
Software to enter, store, organise, select & retrieve data; the interface between user and database.
Two or more computer systems linked by communication channels to share data and information.
Connects two or more private networks over a public network (internet) securely.
A holistic view of data & information across areas and functions of the organisation.
Collecting similar transactions over a period and processing them together (e.g. monthly payroll).
Handling individual transactions as they occur — master files updated immediately.
A cross-functional system of integrated software modules supporting core internal processes in real time.
Core Concept — From Data to Decisions
📌INPUT
Data Raw facts — e.g. sales figures, customer contacts, website traffic
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PROCESS
Information system Collects & processes data
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OUTPUT
Meaningful information Provided to users
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USED FOR
Strategic planning · decision making · performance monitoring · production
Information Technology vs Information System
⚖️| Basis | INFORMATION TECHNOLOGY | INFORMATION SYSTEM |
|---|---|---|
| Scope | The equipment — computers & telecommunications (and TV, telephone, radio) | Broader — ICT (hardware + software) plus how people interact with it to support business processes |
| Does what | Capture, store, transmit, present data | Collection, storage, production & distribution of information; supports operations, management & decision making |
Role of Information Systems
📌WHAT IS DO
- Give companies & consumers access to vast information
- Facilitate communication with staff and internal & external stakeholders
- Let new companies compete in geographically dispersed markets
- Store, access & analyse data; improve customer communication; enhance employee collaboration
HOW IT BOOSTS EARNINGS
Improve efficiency → reduce expenses → earnings ↑
Attract customers / offer more products → raise revenue → earnings ↑
Self-Test Q3: reduce expenses & increase earnings.
⚠ BUT — COST-BENEFIT FIRST IS investment can be costly. Carry out a cost-benefit analysis to ensure a net positive return within their relatively short useful lives (rapid technological change).
5 Uses of Information
📌Irrespective of level — strategic, tactical or operational
| Use | Description / Study Text examples |
|---|---|
| 1. Planning | Establish appropriate resources & time scales; forecast alternative outcomes |
| 2. Controlling | Ensures processes are implemented as planned |
| 3. Recording transactions | Sales, purchases, errors, returns, customer complaints, quality inspections, deposits, cash movements |
| 4. Performance measurement | Compare actual vs planned (budgeted) → identify variances → corrective action |
| 5. Decision making | Purchase & production volumes, pricing, make or buy, switch suppliers, when to replace assets, organise operations to minimise tax |
The 6 Key Elements of an Information System
📌① DATA raw facts
② DATABASE electronic filing
③ DBMS
manage & retrieve
④ NETWORKS connect & share
⑤ INTEGRATION holistic view
⑥ SECURITY &
PRIVACY
protect data
Data → Database → Dbms
📌DATA Values of qualitative or quantitative variables about persons or objects. Forms: numbers/text on paper, bits/bytes in memory, or facts in a person’s mind. Business data — sales figures, customer contacts, website traffic → processed into meaningful & useful information (Q4).
DATABASE Core of business IS. Users access it for inventory orders, production scheduling, long-range forecasts. e.g. customer database (names, addresses, payment methods, orders, prices, histories) serves many departments. Large firms: data warehouses & data marts.
DBMS Software to quickly & efficiently enter, store, organise, select, retrieve. Interface between end user and database; manages the data, database engine & schema (Q6).
Main types: Hierarchical Network
Relational Object-oriented Popular examples: cloud-based, in-memory (IMDBMS), columnar (CDBMS), NoSQL
Networks
📌COMPUTER NETWORK
Most businesses use networks to deliver
information to employees, suppliers & customers (Q10). Links thousands of users; carries audio, video & data. Best-known network: the internet (Q11).
USES OF NETWORKS
World wide web
Sharing software (databases, worksheets)
Email Sharing printers, fax, scanners
Online booking Instant messaging
Internet-based communication
VIRTUAL PRIVATE NETWORK (VPN) Connects private networks (e.g. LANs) over a public network securely (Q12); strong security → only authorised users. For dispersed offices, often more cost-effective than buying equipment & leasing private lines.
Integration
📌WHY INTEGRATE?
- Firms cannot operate effectively with separate departmental systems
- Requires a team effort across the organisation
- Company-wide ERP (HR, operations, technology) is becoming integral to strategy
- Manage collective knowledge — e.g. via data warehouses
- Integrated IT system: all modules linked & working in a coordinated way
STUDY TEXT EXAMPLE — INTEGRATED FINANCE SYSTEM
Accounts payable Accounts receivable Accruals & prepayments
Bank & cash Inventory Purchases Sales
New sales order
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Recorded simultaneously in receivables, sales & inventory
Security & Privacy
📌THE COST OF UNAUTHORISED ACCESS Monetary + reputational risk. Most damaging threats: worms, viruses & Trojan horses; computer theft; financial fraud; unauthorised network access. Criminals now professional gangs (not lone amateurs); internet anonymity → identity theft; remote working adds concerns.
MAJOR CATEGORIES OF COMPUTER CRIME TO PREVENT
- Unauthorised access & security breaches
- Viruses, worms & Trojan horses
- Deliberate damage to equipment/information
- Spam
- Software & media piracy
FIRST STEP
Formal written information security policies — set standards & basis for enforcement. Without them firms stay reactive (crisis response) instead of preventive.
PRIVACY Collecting personal data across platforms challenges privacy → balance collecting needed information with protecting consumer rights. Many firms’ privacy policies promise not to misuse data; regulators increasingly act against breaches.
Types of Information Systems — Overview
🧩IS collect & store key data and generate information for analysis, control & decision-making — e.g. factories (automate production, track inventory), order processing, billing & vendor payments, banks (deposits, ATM withdrawals, loan payments). Each type serves a level of decision-making: operational, tactical or strategic.
TPS
Transaction Processing
MSS
Management Support
DSS
Decision Support
EIS
Executive Information
ES
Expert System
Office automation
communication flow
Transaction Processing System (Tps)
📌FOUNDATION OF AN INTEGRATED IS
- Receives raw data (internal & external) → prepares it for a large central database managed by a DBMS; users query when required
- Automates routine tasks — accounting, order processing, financial reporting
- Reduces clerical costs; quick operational insights
- Data entry: manual, or OCR / MICR
DATA ENTRY — EXAMPLES OF DATA
Sales information Purchase information
New employee details Updates to employee details
A database is updated in two main ways: (i) batch processing, (ii) online / real-time processing.
| Basis | BATCH PROCESSING | REAL-TIME (ONLINE) PROCESSING |
|---|---|---|
| How | Collect similar transactions over a period; process together (Q5) | Each transaction handled as it occurs; master files updated immediately (Q8) |
| Example | Monthly payroll | Airline information systems (Q9), online banking |
| Status / cost | Traditionally centralised mainframes; less dominant now but still used | More expensive; essential where up-to-date info is critical |
| ✓ / ✗ | — | ✓ Always up to date; more data online ✗ Higher development/maintenance cost; more hardware capacity |
Examples of Tps
🧪Study Text
FINANCE & ACCOUNTING TPS Functions: budgeting · nominal ledger · invoicing · management accounting
Nominal ledger Accounts payable Accounts receivable
Budgeting Treasury management
HUMAN RESOURCES TPS Functions: personnel records · benefits · salaries · labour relations · training
Payroll Employee records Employee benefits
Career path systems (appraisal)
Management Support System (Mss)
📌HOW IT WORKS
- Uses the internal master database for high-level analyses
- Core: an information-reporting system — regular & special reports from TPS summary data, tailored to users
- Tools include data warehouses — CRM, fraud detection, product-line analysis, asset management
- e.g. retailers: customer demographics & shopping patterns; banks: detect fraud, usage trends
A MANAGEMENT INFORMATION SYSTEM…
- Supports structured decisions
- Reports on existing operations
- Little analytical capability; relatively inflexible
- Focuses on internal operations
- Regular reports; online access for many users
- Current + historical information
Decision Support System (Dss)
📌WHAT & WHY Related programs & data for analysis & decisions. Developed to overcome MIS limitations — quantitative data, predictive models, interactive models simulating real processes. Uses internal data but focused on the issue. Ideal for “what if” questions. e.g. marketing executives forecast customer furniture preferences from sales & demographic data.
CHARACTERISTICS
- Assists tactical-level managers — where estimates/judgement needed
- Formulas & equations → mathematical modelling
- Real-time; queries & modelling
- Intuitive interface; often a natural language interpreter
- Integrates data management + modelling software
- Can be built with spreadsheet packages
Executive Information System (Eis) & Expert System (Es)
📌EIS
- Like a DSS but customised for an individual executive → strategic decisions
- e.g. CEO’s EIS: spreadsheets comparing with competitors; graphs of economic & industry trends
- Internal + external data; forward-looking
- Graphical dashboard; drill-down for detail
- Unstructured decisions (e.g. price fixing)
- Very expensive, real-time; used by few senior managers
EXPERT SYSTEM Simulates judgement of an expert; database of experience + rules Advice like a human consultant; AI → reason & learn (what-if) e.g. legal & medical diagnostics, loan applications, chess, oil exploration, shift scheduling Expensive & difficult to create; may replace or assist experts
MOST EFFECTIVE WHEN problem well-defined · expert can define rules · not solvable by TPS · expert freed for harder problems · cost-justified
Comparing the Types of IS
🧩Built only from Study Text points
| Basis | TPS | MSS / MIS | DSS | EIS |
|---|---|---|---|---|
| Level / user | Operational | Middle (tactical) | Middle (tactical) | Senior (strategic) — individual executive |
| Decisions | Routine transactions | Structured | Estimates & judgement; “what if” | Unstructured |
| Data | Raw internal & external data → central database | TPS summary data; internal; current + historical | Internal data focused on the issue; models | Internal + external; forward-looking |
| Output style | Recorded transactions | Regular & special reports | Interactive modelling | Dashboard with drill-down |
Other Specialised Systems
📌FINANCIAL REPORTING SYSTEM (FRS) Financial accounting & reporting involve (Q14): ① maintaining accounting records of transactions ② reporting financial position & performance in financial statements Book-keeping/ledger system = foundation; summarised (usually annually). Must be reliable, accurate, complete; data entry for authorised personnel only.
ENTERPRISE RESOURCE PLANNING (ERP) Cross-functional, integrated software modules; real-time view of core processes (order processing, inventory management). Continuously updated whichever department enters data → hence ‘enterprise’.
Tracks resources: cash · raw materials · Tracks commitments: purchase orders · production capacity · personnel employee costs · customer orders
| ERP in Pakistan | Typical systems | Features |
|---|---|---|
| Small firms | QuickBooks | Affordable, simple — accounting, inventory, payroll |
| Medium firms | SAP Business One, Microsoft Dynamics 365, Odoo | Finance, CRM, inventory, operations |
| Large firms | SAP S/4HANA, Oracle ERP Cloud, Dynamics 365 Finance & Operations | Global finance, procurement, HR, supply chain; advanced analytics & real-time processing (Q7) |
Levels of Information Systems
📌Study Text table
SENIOR · strategic · EIS
MIDDLE · tactical · MIS, DSS
OPERATIONAL · operational · TPS
OPERATIONAL LEVEL Day-to-day transactions — cashiers at point of sale, bank tellers, hospital nurses, customer care staff. Defined rules → structured decisions.
Operational information: daily sales reports · daily production reports · latest inventory levels · customer complaint details
MIDDLE LEVEL Middle managers, heads of department, supervisors — oversee operational management. Tactical decisions partly based on set guidelines & partly on judgement. e.g. bank credit manager checks limit & payment history, then makes an exception to raise a limit — partly structured.
Tactical information: fee to quote on an order · discounts to clear excess inventory · switching suppliers
SENIOR LEVEL Unstructured, strategic decisions (Q13); long-term planning; use tactical managers’ information + external data.
Strategic information: long-term (e.g. 3–5 years); for senior management & directors; internal + external (competitors, market, business environment)
⚠ NOTE ON WORDING The Study Text calls middle-level decisions “tactical, unstructured decisions partly based on set guidelines”, then describes
its own example as “partly structured”. Safest exam reading: middle level = tactical, partly structured; senior = unstructured; operational = structured.
Business Application — Identify the System
📌Examples from the Study Text
| Business situation | System / method |
|---|---|
| Airline information system / online banking | Real-time processing |
| Monthly payroll | Batch processing |
| Retailer studies customer demographics & shopping patterns | MSS — data warehouse |
| Forecast customer furniture preferences (“what if”) | DSS |
| CEO compares company with principal competitors on a dashboard | EIS |
| Processing a loan application / medical diagnosis | Expert system |
| New sales order hits receivables, sales & inventory at once | Integrated (finance) system |
How This Chapter Can Be Tested
📌1 Definition-based — IS, IT, data, database, DBMS, VPN, ERP, batch vs real-time
2 “Which is NOT…” — paper-based filing is NOT part of IT (Q1)
3 Function identification — DBMS = interface between user & database (Q6)
4 Classification — match IS type to level: EIS–senior, MIS/DSS–middle, TPS– operational
5 Comparison — IT vs IS; batch vs real-time; MIS vs DSS vs EIS
6 Scenario — identify the IS or processing method from a business example
Exam Traps
⚠️1 IT vs IS — IS is broader — includes how people interact with the technology; IT is the equipment.
2 What is IT? — Includes computers, networks, telecoms, even TV, telephone, radio — but not paper-based filing (Q1).
3 Data vs information — Data = raw facts; processed into meaningful & useful information (Q4).
4 Database vs DBMS — Database = the electronic filing system; DBMS = the software interface managing it (Q6).
5 Batch vs real-time — Batch = group over a period (payroll); real-time = immediate master-file update (Q8).
6 Real-time example — Airline information system (Q9) — not monthly payroll or inventory batch updates.
7 Real-time cost — More expensive — complex to develop & maintain; needs more hardware.
8 Best-known network — The internet (Q11) — not LAN or VPN.
9 VPN purpose — Connect private networks over a public network securely (Q12) — not speed or free access.
10 MIS limits — Structured decisions, little analysis, inflexible, internal — DSS was built to overcome this.
11 DSS vs EIS — DSS: tactical, “what if” models. EIS: strategic, individual executive, internal + external, dashboard.
12 EIS decisions — Unstructured (e.g. price fixing); very expensive; few senior users.
13 Expert system conditions — Well-defined problem, rules definable, not solvable by TPS, cost-justified.
14 Security first step — Written information security policies — else firms stay reactive.
15 Level ↔ system — Senior–EIS; middle–MIS, DSS; operational–TPS.
16 Strategic horizon — Strategic information: long-term, e.g. 3–5 years; internal + external.
Decision Tree — Which Information System?
📌STEP 1 · WHO USES IT, AND WHAT KIND OF DECISION?
OPERATIONAL · structured
MIDDLE · tactical
SENIOR · unstructured
A
Records routine transactions → TPS
C
Regular reports from TPS summary data, structured → MSS / MIS
E
Customised dashboard, internal + external data → EIS
B
Grouped over a period → BATCH; each as it occurs → REAL-TIME
D
Interactive models, “what if” → DSS
CHECK Cross-functional, real-time, all modules linked → ERP / integrated system. Records & financial statements → FRS. Mimics a human expert’s judgement using rules → EXPERT SYSTEM (the Study Text does not assign ES to a level).
MCQ Quick-clue Section
🎯All 14 Self-Test questions
NOT part of IT
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Paper-based filing (Q1)
Key function of IS
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Support operations, management & decisions (Q2)
Benefit of using IT well
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Reduce expenses, raise earnings (Q3)
Business data processed into
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Meaningful & useful information (Q4)
Batch processing
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Group similar transactions together (Q5)
Function of DBMS
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Interface user ↔ database; manages schema (Q6)
High-end ERP feature
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Real-time processing & analytics (Q7)
Key feature of real-time
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Update master files immediately (Q8)
Real-time example
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Airline information system (Q9)
Businesses use networks to
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Deliver info to employees, suppliers, customers (Q10)
Best-known network
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The internet (Q11)
VPN purpose
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Connect private networks over public network securely (Q12)
Senior-level decisions
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Unstructured, strategic (Q13)
Financial accounting & reporting
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Maintaining accounting records (Q14)
Quick Memory Map
🧠| Concept | Key words | Core idea |
|---|---|---|
| Role of IS | data → information · communication · earnings | better decisions, lower costs |
| 5 uses | planning · controlling · recording · performance · decisions | how information is used |
| IT vs IS | equipment vs equipment + people | IS is broader |
| Key elements | data · database · DBMS · networks · integration · security | building blocks of IS |
| TPS | raw data · routine · batch/real-time | operational foundation |
| MSS / DSS | reports · structured / models · what if | middle-level support |
| EIS / ES | dashboard · external / expert rules | strategic & expert advice |
| Levels | EIS · MIS/DSS · TPS | senior · middle · operational |
MNEMONIC — 6 KEY ELEMENTS
“Do Data Designers Need Integrated Security?”
D Data D Database D DBMS N Networks I Integration S Security & privacy Memory aid only.
Business — Information Systems in 60 Seconds
⚡⏱ CONCEPTS
- IS: data → information for decisions
- IT = equipment; IS = IT + people
- 5 uses: plan, control, record, measure, decide
- Cost-benefit before investing
⏱ ELEMENTS
- Database = filing; DBMS = interface
- Networks; internet best-known; VPN
- Integration → ERP (real-time)
- Security policy = first step
⏱ TYPES & LEVELS
- TPS: batch (payroll) / real-time (airline)
- MIS: structured reports; DSS: what if
- EIS: senior, dashboard; ES: expert rules
- Senior–EIS · Middle–MIS/DSS · Ops–TPS
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