ZeePedia buy college essays online


Information Systems

<<< Previous Manufacturing Information System, Inventory Sub System, Production Sub System, Quality Sub system Next >>>
 
img
VU
Information System (CS507)
LESSON 13
Organizational Structure
Departments are structured based on the set of related responsibilities. The set of responsibilities being
discharged set the tone and structure of that department. The complexity and diversity of these
responsibilities also affect how departments are set in an organization.
Existence of Functional departments in every organization vary with the nature of industry and the nature
of products/services being offered
Certain departments may not exist in an organization, for instance financial sector (banking, leasing
companies) and travel agencies do not incorporate the concept of manufacturing as they belong to the
services sector.
Let's take a look at different departments in different industry segments in order to better understand the
concept.
13.1 Financial Sector
The departmental structures are different in banking and financial sector. This in turn becomes the basis of
design and development of functional information systems. Banks commonly have following departments
o  Treasury
o  Advances
o  Trade Finance
o  Corporate Finance
o  Consumer Banking
o  Deposits
o  Customer Services
o  Lease
o  Credit Card
o  Debit card
o  Operations
Requirements of Information Systems and procedures of financial analysts, investment houses, brokerage
houses, leasing companies will depend on their differing functions and needs.
13.2 Air Line Industry
Various departments may be
Flight Operations department
o  Flight scheduling department
o  Cockpit crew department
o  Cabin Crew department
Engineering department ­ engine maintenance
Ground Support ­ air craft handling department
Catering
Internal audit
47
img
VU
Information System (CS507)
Accounts & Finance
Sales ­ ticketing, E-ticketing, agents
Marketing
Store ­ engines, maintenance and repair accessories
These departments and their needs determine the design of information systems they require.
As shown in the above two examples, the constitution of departments in both banking institutions and air
travel industry vary to a large extent.
13.3 Manufacturing Information System
The information needs were and are always there. Information systems used to exist when computerised
environments were not available. Automation has enhanced the availability of information.
Every industry has its own departmental structure which gives rise to a different set of sub-systems as part
of the information system. Here we would consider the sub-systems of a manufacturing system only.
Following are the sub-systems of an information system.
Raw Material Procurement Sub-System
This is the commencement of the manufacturing process. Some might think of procurement as a simple
purchasing process like any other commodity but the spirit of having an all-embracing raw material
procurement sub-system is simply more than that.
48
img
VU
Information System (CS507)
Parameters of Raw-material Procurement
Like with every system, there has to be a list of minimum specifications which every system or subsystem
has to cover. Purchasing logistics of an entity critically affect time to market and other quality related
issues. Issues like selection of suppliers, choice between local purchase or import and delivery time taken
by the supplier. All these concerns are met and dealt with in the purchase subsystem. The complexity of
the purchase subsystem should depend on types of raw materials required, number of suppliers to deal
with and complexity of the terms of purchase agreements for long term.
With higher customer expectations, every organization wants to efficiently manage its suppliers and other
internal processes. Supply chain management spans all movement and storage of raw materials, work-in-
process inventory, and finished goods from point-of-origin to point-of-consumption. A procurement
system should help in improving the supply chain of the organization.
13.4 Inventory Sub System
Inventory subsystem focuses on maintaining records and movements on inventory levels and usage. This
control of inventory is critical to the organization since money lock-in of raw materials purchase represents
substantial investment. Timely production of finished goods require availability of right quantity of material,
maintenance of right stock levels, determination of lead times and flex times and exchange of information
with supplier at the right time. An inventory subsystem helps us to address these issues. Inventory
subsystems are critical where the organization is following Just in Time approach ­ a philosophy which
encourages zero tolerance for stock levels and placing orders exactly when they are needed for
manufacturing.
Proper logistic management is important for the timely and quality production. Various factors which can
play critical role are
 Who to purchase from ­ supplier selection
When to purchase ­ time of delivery or raw materials
How much to purchase ­ Ideal stock levels
An efficient inventory subsystem helps us to deal with these issues in a time saving manner.
13.5 Production Sub System
It can be seen as the most critical part of the entire manufacturing sub system. Basically it tracks the flow of
the job through the entire production process. It also records change in form of goods or transfer of goods
from one place to the other.
Example
Consider a manufacturing entity working with three processing departments and one assembly department.
As raw materials pass through the processes, the sub system records the relevant information at specific
points or locations until the finished goods are transferred to stock room.
49
img
VU
Information System (CS507)
13.6 Maintenance & Scheduling Sub System
For efficient production, the machines should be timely available. Many a times, the machine is under repair
and is not available to be used for production. Without this subsystem, there is a possibility of customer's
orders not being met on time. Certain issues that can be very important are
Deciding delivery time in accordance with availability of machines.
Any foreseen machine-down-time.
Any major overhauling / tuning / replacement expected may result in unavailability of machine. An
overhauling schedule should be kept so that the production of finished goods is not halted.
Avoiding duplication of jobs for the same machine.
13.7 Quality Sub system
This subsystem ensures the production made and end product being delivered to the customer are
conforming the quality standards set by the company. Quality covers aspects for the organization like better
quality raw materials and what is being purchased is according to organization's standards and improved
finished goods in accordance with the customer specification.
50
img
VU
Information System (CS507)
The question now arises is why do we need a quality sub-system? It is defined and demanded by customer,
it has to be achieved by management, it is a firm wide responsibility and these subsystem provide the firm's
managers with information that reveals the extent to which the firms products are achieving the quality
goals.
13.8 Total Quality Management (TQM)
TQM is a set of management and control activities which focus on quality assurance. The quality of the
products and services is enhanced and then offered to consumers. An organizational undertaking to
improve the quality of manufacturing and service, it focuses on obtaining continuous feedback for making
improvements and refining existing processes over the long term. There are certain Graphical tools used to
implement and promote TQM. For instance
o  Histogram
o  Pareto Analysis
o  Cause & Effect Diagram
Costing Sub System
Costs are incurred more frequently in a manufacturing entity. Monitoring these costs on regular basis
requires instituting a formal cost subsystem. Cost sub systems are responsible for generation of cost reports
which represent cost break ups on various bases, for instance
o  Machine usage basis
o  Product basis
o  Department wise
Order Processing Sub System
This subsystem deals with following issues.
Status of orders placed with suppliers
Status of departmental requisitions
Quality of materials received
Any other issues related to suppliers
Order processing subsystem gives a snapshot of statuses of various orders placed, at any given time.
Management Levels in Manufacturing Information Systems
Manufacturing Information System should cater for information requirements at each level, for instance
Strategic level
3. Locating new plant which can save cost
4. Investment in new manufacturing technology
Knowledge Level
3. Distribute knowledge to drive the production process
4. Innovating new forms of manufacturing processes
Management level
2. Monitoring production costs and resources
51
img
VU
Information System (CS507)
Operational Level
2. Status of production tasks
13.9 Planning Productions/Operations
This function in many firms is supported by IT. The major areas of planning and their computerised
support are as follows.
o  Materials Requirement Planning (MRP)
o  Manufacturing Resource Planning (MRP II)
o  Automated Software
Computer Aided Design (CAD)
Computer Aided Manufacturing (CAM)
Computer Integrated Manufacturing (CIM)
13.10 Materials Requirement Planning (MRP)
Material procurement needs to be planned in compliance with the production Schedule. Initially companies
used to do plan it manually through a document termed as "Material Requirement Plan". Material
Requirements Planning (MRP) is software based production planning and inventory control system for
material procurement and scheduling.
It helps meeting three objectives:
o  Ensure materials and products are available for production and delivery to customers.
o  Maintain the lowest possible level of inventory.
o  Plan manufacturing activities, delivery schedules and purchasing activities.
MRP helps in getting the right material and physical resources together at the right place and at the right
time to meet the customer's requirements. This helps in achieving on time delivery, High Quality, at the
best price.
13.11 Manufacturing Resource Planning (MRP II)
An expanded version of MRP that integrates finance, accounting, accounts payable, and other business
processes into the MRP system. It also includes production scheduling function, and inventory control
functions. It is an integrated computer system that connects the regular MRP to other functional area,
especially finance and human resources. It is made up of a variety of functions, each linked together:
o  Business planning
o  Sales and operations planning
o  Production planning
o  Master scheduling
o  Material requirements planning
o  Capacity requirements planning
Benefits of MRP II
MRP II involves the entire company
o  Management business rules for strategic planning can be set, and enforced by MRP II.
o  Sales and Marketing can incorporate sales goals that fit material and capacity constraints.
o  Relationships can be developed with vendors to improve purchasing just in time.
o  Inventory shortages can be seen before they happen, with communications to customers to
get approval of substitutions that will get a part that does the same thing, on schedule.
52
img
VU
Information System (CS507)
Accounting and finance departments get accurate costs, and predict cash flow.
o
Automated Tools
IT has been used successfully in cutting the time required for the design of products, services or processes.
Some of these applications are
Computer Aided Design (CAD)
Computer Aided Manufacturing (CAM)
Computer Integrated Manufacturing (CIM)
13.12 Computer Aided Design (CAD)
"It is a system that enables drawings to be constructed on a computer screen and subsequently stored,
manipulated and updated electronically."
The ability to rotate or create movement in the design allows testing for clearances and frequently reduces
the cost of prototyping the products. The technology is used for a wide variety of products in such fields as
architecture, electronics, and aerospace, naval, and automotive engineering. Although CAD systems
originally merely automated drafting, they now usually include three-dimensional modeling and computer-
simulated operation of the model. Rather than having to build prototypes and change components to
determine the effects of tolerance ranges, engineers can use computers to simulate operation to determine
loads and stresses. For example, an automobile manufacturer might use CAD to calculate the wind drag on
several new car-body designs without having to build physical models of each one. In microelectronics, as
devices have become smaller and more complex, CAD has become an especially important technology.
Among the benefits of such systems are lower product-development costs and a greatly shortened design
cycle. While less expensive CAD systems running on personal computers have become available for do-it-
yourself home remodeling and simple drafting, state-of-the-art CAD systems running on workstations and
mainframe computers are increasingly integrated with computer-aided manufacturing systems.
13.13 Computer Aided Manufacturing (CAM)
Computer-aided manufacturing (CAM) is a form of automation where computers communicate work
instructions directly to the manufacturing machinery. The technology evolved from the numerically
controlled machines of the 1950s, which were directed by a set of coded instructions contained in a
punched paper tape. Today a single computer can control banks of robotic milling machines, lathes,
welding machines, and other tools, moving the product from machine to machine as each step in the
manufacturing process is completed. Such systems allow easy, fast reprogramming from the computer,
permitting quick implementation of design changes. The most advanced systems, which are often
integrated with computer-aided design systems, can also manage such tasks as parts ordering, scheduling,
and tool replacement.
It is a system that uses computer aided techniques to control production facility. Some of these techniques
are
o  Computer-aided process planning ­ Use of computer to control activities and functions to prepare
a detailed set of plans and instructions to produce a machine or part. -- Machines
o  Computerised Numerical control (CNC) ­ refers specifically to the computer control of machine
tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other
materials. e.g. drills, wood routers use this technology.
o  Robotics programming ­ The science or study of the technology associated with the design,
fabrication, theory, and application of robots. ­ Automobile industry.
53
img
VU
Information System (CS507)
13.14 Computer Integrated Manufacturing (CIM)
Integrated computerized manufacturing system combining all the elements of computer aided design (cad)
and computer-aided manufacturing (cam). This is an interactive computer system usually installed on a
local area network linking several related departmental functions such as design, engineering, production,
and marketing. The concept of CIM insures rapid high-quality product development and manufacturing
through real-time coordination of all related functions. See also computer aided design (cad).
Computer-integrated manufacturing (CIM): It is the total integration of Computer Aided Design /
Manufacturing and also other business operations and databases. It is concept/philosophy about the
implementation of various integrated computer systems in factory automation.
13.15 Computer Integrated Manufacturing (CIM) Goals
CIM has three basic goals
Simplification of all manufacturing technologies and techniques
Automation of as many of the manufacturing processes as possible by integration of many
information technologies like
o  Flexible Manufacturing Systems ­ a form of flexible automation in which several machine tools are
linked together by a material-handling system controlled by a central computer. It is distinguished
from an automated production line by its ability to process more than one product style
simultaneously.
o  Computer aided Engineering (CAE) -- the application of computer software in engineering to
analyze the robustness and performance of components, assemblies, products and manufacturing
tools.
o  Just in time (JIT) ­ A Japanese idea that inventory is manufactured (or acquired) only as the need
for it arises or in time to be sold (or used). A major goal is to cut down on inventory investment.
Integration and coordination of all the manufacturing aspects through computer hardware and
software.
54
Table of Contents:
  1. Need for information, Sources of Information: Primary, Secondary, Tertiary Sources
  2. Data vs. Information, Information Quality Checklist
  3. Size of the Organization and Information Requirements
  4. Hierarchical organization, Organizational Structure, Culture of the Organization
  5. Elements of Environment: Legal, Economic, Social, Technological, Corporate social responsibility, Ethics
  6. Manual Vs Computerised Information Systems, Emerging Digital Firms
  7. Open-Loop System, Closed Loop System, Open Systems, Closed Systems, Level of Planning
  8. Components of a system, Types of Systems, Attributes of an IS/CBIS
  9. Infrastructure: Transaction Processing System, Management Information System
  10. Support Systems: Office Automation Systems, Decision Support Systems, Types of DSS
  11. Data Mart: Online Analytical Processing (OLAP), Types of Models Used in DSS
  12. Organizational Information Systems, Marketing Information Systems, Key CRM Tasks
  13. Manufacturing Information System, Inventory Sub System, Production Sub System, Quality Sub system
  14. Accounting & Financial Information Systems, Human Resource Information Systems
  15. Decision Making: Types of Problems, Type of Decisions
  16. Phases of decision-making: Intelligence Phase, Design Phase, Choice Phase, Implementation Phase
  17. Planning for System Development: Models Used for and Types of System Development Life-Cycle
  18. Project lifecycle vs. SDLC, Costs of Proposed System, Classic lifecycle Model
  19. Entity Relationship Diagram (ERD), Design of the information flow, data base, User Interface
  20. Incremental Model: Evaluation, Incremental vs. Iterative
  21. Spiral Model: Determine Objectives, Alternatives and Constraints, Prototyping
  22. System Analysis: Systems Analyst, System Design, Designing user interface
  23. System Analysis & Design Methods, Structured Analysis and Design, Flow Chart
  24. Symbols used for flow charts: Good Practices, Data Flow Diagram
  25. Rules for DFDs: Entity Relationship Diagram
  26. Symbols: Object-Orientation, Object Oriented Analysis
  27. Object Oriented Analysis and Design: Object, Classes, Inheritance, Encapsulation, Polymorphism
  28. Critical Success Factors (CSF): CSF vs. Key Performance Indicator, Centralized vs. Distributed Processing
  29. Security of Information System: Security Issues, Objective, Scope, Policy, Program
  30. Threat Identification: Types of Threats, Control Analysis, Impact analysis, Occurrence of threat
  31. Control Adjustment: cost effective Security, Roles & Responsibility, Report Preparation
  32. Physical vs. Logical access, Viruses, Sources of Transmissions, Technical controls
  33. Antivirus software: Scanners, Active monitors, Behavior blockers, Logical intrusion, Best Password practices, Firewall
  34. Types of Controls: Access Controls, Cryptography, Biometrics
  35. Audit trails and logs: Audit trails and types of errors, IS audit, Parameters of IS audit
  36. Risk Management: Phases, focal Point, System Characterization, Vulnerability Assessment
  37. Control Analysis: Likelihood Determination, Impact Analysis, Risk Determination, Results Documentation
  38. Risk Management: Business Continuity Planning, Components, Phases of BCP, Business Impact Analysis (BIA)
  39. Web Security: Passive attacks, Active Attacks, Methods to avoid internet attacks
  40. Internet Security Controls, Firewall Security SystemsIntrusion Detection Systems, Components of IDS, Digital Certificates
  41. Commerce vs. E-Business, Business to Consumer (B2C), Electronic Data Interchange (EDI), E-Government
  42. Supply Chain Management: Integrating systems, Methods, Using SCM Software
  43. Using ERP Software, Evolution of ERP, Business Objectives and IT
  44. ERP & E-commerce, ERP & CRM, ERP Ownership and sponsor ship
  45. Ethics in IS: Threats to Privacy, Electronic Surveillance, Data Profiling, TRIPS, Workplace Monitoring