Introduction to System Analysis and Design(Definition of System) - Dr. Mahmoud Abu-Arra- Mr. Ahmad Al-Ghoul

System Analysis and Design

System Analysis and Design Introduction to SAD

Learning ObjectivesDiscuss the impact of information technology on business strategy and successDiscuss what is SAD and why is it important to businessDiscuss the impact of IT on business

System Analysis and Design Introduction to SAD

introductionOrganizations are large systems composed of interrelated subsystems, IT affects productivity, quality, customer loyalty, and help makes better decisions.To ascertain information requirements properly and design appropriate information systems, it is of primary importance to understand the impact of information technology on business strategy and success, the characteristics of system, and the components of information systems

System Analysis and Design Introduction to SAD

The Impact of Information TechnologyInformation Technology Combination of hardware and software products and services that companies use to manage, access, communicate, and share informationInformation is a vital asset that must be used effectively, updated, connected, transmitted, analyzed, and used well

System Analysis and Design Introduction to SAD

The Impact of Information TechnologyThe Future of ITIT has created a new economy, where advances in hardware, software, networks provide huge benefits to businesses worldwide.Globalization and the increasing internet users around the world, give IT budgets high priority, to reach new markets, to build and manage distributed companies and to reduce costs

System Analysis and Design Introduction to SAD

Systems Analysis and Design is the process people use to create information systemspeopleprocessesdatasoftwarehardwareSA&D15

System Analysis and Design Introduction to SAD

The Impact of Information TechnologyWhat is Systems Analysis and Design (SAD)?Systems Analysis: understanding and specifying in detail what an information system should doSystem Design: specifying in detail how the parts of an information system should be implementedWhy is it important?Success of information systems depends on good SADWidely used in industry - proven techniquespart of career growth in IT - lots of interesting and well-paying jobs! (rated 2nd best job)

System Analysis and Design Introduction to SAD

The Impact of Information TechnologyThe Role of Systems Analysis and DesignInformation Systems Analysis and DesignStep-by-step process whereby computer-based information systems are developed and maintained

Systems Analystis a key person analyzing business, depending on organization function, requirements, identifying opportunities for improvement, solving problems, and designing information systems to implement these ideas.

Many failed systems were abandoned because analysts tried to build wonderful systems without understanding the organization.

System Analysis and Design Introduction to SAD

The Impact of Information TechnologyWho develops Information Systems?Before taking the decision to build In-house applications or purchased systems from outside vendors or both, the organization must determine what the system is supposed to do.A company must begin to outlining its business needs and possible IT solutions, then it can consider the implementation options.The choice is not easy because there are many options includeInternet-based application services OutsourcingCustom solutionsEnterprise-wide software strategies

System Analysis and Design Introduction to SAD

Sequence SummaryIn this sequence, you learned that information technology (IT) refers to the combination of hardware, software, and telecommunications systems that support businessIT supports business operations, improves productivity, and helps managers makes decisions.System analysis and design is the process of developing information systems that transform data into useful informationSystem analyst is a key person analyzing business, depending on organization function, requirements, identifying opportunities for improvement, solving problems, and designing information systems to implement these ideas.Traditionally, companies either developed in-house applications or purchased software packages from vendors.Today the choice is much more complex, but it is always important for companies to plan the system carefully before considering implementation options.

System Analysis and Design Introduction to SAD

Sequence SummaryIn this Sequence we haveDefined the term information technologyDescribed the Future of ITDefined system analysis and design and why it is importantDefined the analyst and the role he/she plays in information system development

System Analysis and Design Introduction to SAD

Reference[1] System Analysis and Design, Sixth Edition Authors: Gary B. Shelly, Thomas J. Cashman and Harry J. Rosenblatt , Publisher: SHELLY CASHMAN SEWIES.

[2] Modern Systems Analysis and Design Third Edition Authors: Jeffrey A. Hoffer , Joey F. George, Joseph S. Valacich Publisher: prentice hall

System Analysis and Design Introduction to SAD

Hi students how are you doing in ahmad al goul and I will be your lecturer today.our sequence today is about the impact of information technology in todays information systemsHi students how are you doing our course is about system analysis and design.

Ok let us first talk in general about systems and the role for information in todays business

System analysis and design is a very important field to study because the whole universe is a system our lives is a system so understanding

systems analysis and design is a very important issue to consider in failure and success in every thing around us

First, even though your work as a systems analyst will probably focus on one kind of system an automated, computerized information system it

will generally be a part of a larger system. For example, you may be working on a payroll system, which is part of a larger human resources

system, which is, in turn, part of an overall business organization, which is, in turn, part of al larger economic system, and so on. Thus, to make

your system successful, you must understand the other systems with which it will interact. Many of the computer systems that we build are

replacements, or new implementations of, non-computerized systems that are already in existence. Also, most computer systems interact with, or

interface with, a variety of existing systems. If our new computer system is to be successful, we must understand, in reasonable detail, how the

current system behaves.

Second, even though many types of systems appear to be quite different, they turn out to have many similarities. There are common principles

and philosophies and theories that apply remarkably well to virtually all kinds of systems. Thus, we can often apply to systems that we build in the

computer field, what we have learned about other systems, based on our own day-to-day experience, as well as the experience of scientists and

engineers in a variety of fields.

Thus, if we understand something of general systems theory, it can help us better understand computerized (automated) information systems.

Today, this is more and more important, because we want to build stable, reliable systems that will function well in our complex society, and of

course, there are many examples of non-computer systems that have survived for thousands of years.

Physical systems includes

Stellar systems: galaxies, solar systems, and so on.

Geological systems: rivers, mountain ranges, and so on.

Molecular systems: complex organizations of atoms.

Living systems which includes all of the animals and plants around us, as well as our own human race.

The properties and characteristics of familiar living systems can be used to help illustrate and better understand man-made systems.

Man-made systems include such things as:

Social systems: organizations of laws, customs, and so on.

Transportation systems: networks of highways, canals, airlines and so on.

Communication systems: telephone, telex, and so on.

Manufacturing systems: factories, assembly lines, and so on.

Financial systems: accounting, inventory, and so on.

In this course our focus will be in Information systems.

organizations have long recognized the importance of managing key resources such as labor and row materials. Information has now moved to its

rightful place as a key resource.

Decision makers now understand that information is not just a byproduct of conducting business and can be the critical factor in determining the

success or failure of a business

To maximize the usefulness of information, a business must manage it correctly, just as it manages other resources.

Managers need to understand that costs are associated with the production, distribution, security, storage, and retrieval of all information

Although information is all around us, it is not free, and its strategic use for positioning a business competitively should not be taken for grantedRegardless of the development method, launching a new information system involves risks as well as benefits.

The greatest risk occurs when a company tries to decide how the system will be implemented before determining what the system is supposed to do .

Instead of putting the cart before the horse, a company must begin by outlining its business needs and identifying possible IT solutions.

Typically, this important work is performed by system analysts and other IT professionals.

A firm should not consider implementation options until it has a clear set of objectives.

Later on, as the system is developed, a system analysts role will vary depending on the implementation options selected

This is the end of our sequence today hope you enjoy it

Now you can go to the formative assessment