Systems Analysis And Design Essay Research Paper

Systems Analysis And Design Essay, Research Paper

Systems Analysis and Design

Spring 2000

Chapter 1

Review Questions pg 1.28-29

1. A process is a specific undertaking that needs to be done to bring forth end product. A system is a group of related processs for a peculiar concern map.

2. Data is another word used for input, and information is another word used for end product.

3. The constituents of an information systems ( IS ) are hardware, package, informations, processs, and people.

Hardware: physical bed of information system.

Software: system and application package.

Datas: Critical constituent of every system

Procedures: define undertakings that must be performed by people who work with the system

Peoples: primary intent of IS is to supply valuable info to directors and users.

4. All information either is produced straight or derived from informations.

5. An information systems is the effectual usage of hardware, package, informations, processs, and people to accomplish specific consequences that support the company & # 8217 ; s concern aims.

6. Common concern information systems consist of: buying system, production system, selling system, receivables system, finance system, and human resource system.

7. EDI is the computer-to-computer transportation of informations between companies. An illustration of this is computerized filing of income revenue enhancements.

8. No, the Saturn web-site does non depict the company & # 8217 ; s corporate civilization because corporate civilization is the set of beliefs, regulations, traditions, values, and attitudes that define a company & # 8217 ; s personality and its & # 8217 ; non possible to see all these things through a web-site.

9. The four factors that affect the complexness of a concern information system are:

1. Relationships with other systems

2. Boundaries

3. Specialized concern demands

4. Size of a company

10. The six types of information systems are:

1. Operational & # 8211 ; procedure informations generated by the daily concern minutess of a company

2. Management information system & # 8211 ; computing machine based system that generates seasonably and accurate information for top, in-between, and lower directors.

3. Executive information system & # 8211 ; supports the information demands of top degree directors and their demand to do unstructured determinations? combines characteristics and capablenesss of both MIS and determination support system.

4. Decision support system & # 8211 ; what if analysis..effect on company if gross revenues addition by 10 per centum and costs go up by 5 per centum? .designed to assist do concern determinations by analysing internal or external informations.

5. Expert system & # 8211 ; excite human logical thinking and determination devising by uniting the capable cognition of human experts, called the cognition base, and illation regulations that determine how the cognition is used to make determinations.

6. Office systems & # 8211 ; e-mail, video conferencing, voice mail, facsimile, word processing, desktop, spreadsheets.

11. The four organisational degrees and their Information system demands:

1. Top directors & # 8211 ; executive info. Systems, MIS sum-ups, determination support systems, office systems

2. Middle directors & # 8211 ; MIS sum-ups, and outlooks, determination support systems, office systems.

3. Lower directors & # 8211 ; operational systems inside informations, some MIS sum-ups and exclusions, office systems

4. Operational forces & # 8211 ; operational systems item, expert system, office system

12. The systems development life rhythm is a series of stairss that companies use to construct on information systems.

13. Phase 1: Systems planning

-starts with a written petition called a systems petition, that identifies the information system and describes the desir

ed alterations or betterments.

-identify clearly the nature and range of the job.

-end merchandise is preliminary probe study.

-feasibility survey based on economic, proficient, and operational factors.

Phase 2: Systems analysis

-purpose is to larn precisely how the current system operates, to find and document what the system should make, and to urge alternate solutions.

-define all maps performed by current information systems and find what betterments are needed.

-after assemblage facts, analyze them carefully and develop specific program to work out jobs in current system. This procedure is called demands analysis.

-end merchandise is the systems demands papers, which describes all direction and user demands, alternate programs and costs, and your recommendation.

Phase 3: System design

-purpose is to develop an information system design that satisfies all documented demands

-make a logical finding of what the system must make

-must place all necessary end products, inputs, files, application plans, and manual processs

-design is documented in system design specification and presented to direction and users for their reappraisal and blessing

Phase 4: Systems Execution

-information system is constructed and put in topographic point

-application plans are written, tested, and documented ; operational certification and processs are completed and blessing is obtained from users and directors.

-objective is to present a wholly functioning and documented information system that has been reviewed and approved

-at decision of this stage, the system is ready for usage

Phase 5: System operation and support

-maintenance and sweetenings sometimes are requested to decide jobs identified by users.

-The replacing of a system constitutes the terminal of its overall life rhythm.

14. A system petition is a written petition that identifies the info system and describes the coveted alterations or betterments. It is of import to the SDLC because it can maintain a system unrecorded rhythm traveling or it is the first measure to a whole new system.

15. During systems operations you can make either care alterations to rectify mistakes or conform to specific demands or you can heighten a system to modify capableness, such as supplying new info in an bing study or adding a new study.

16. End merchandises for Phases of SDLC:

Phase 1: preliminary probe study

Phase 2: system demands papers

Phase 3: system design specifications

Phase 4: Systems operation and support

Phase 5: Operation information system.

17. A paradigm is an early on the job version of the information system? prototyping can rush up the SDLC procedure.

18. A CASE tool is a package merchandise that automates a specific systems life rhythm undertaking and eliminates much of the manual attempt.

19. Four common functional countries with in the information systems section are: operations, proficient support, applications, and the information centre.

20. The systems analyst investigates, analyzes, designs, develops, installs, evaluates, and maintains a companies information systems. The systems analysts must be after undertakings, develop agendas, and estimation costs. Conduct meetings, deliver presentations, and write memos, studies, and certification. Must have strong proficient accomplishments and wide cognition of information direction construct, tools, and techniques. Needs strong people accomplishments, and must hold capablenesss to pass on efficaciously. Needs strong leading accomplishments to be after, gauge, the control the undertaking and to train and actuate others