System Analysis System Analysis - Mr. Ahmad Al-Ghoul System Analysis and Design

Avicenna System Analysis and Design System Analysis2 Learning Objectives Explain the role of systems analyst in the evaluation and selection of the development options Explain the role of systems analyst in the evaluation and selection of the development options Inventory and appraise current and proposed hardware Inventory and appraise current and proposed hardware

Avicenna System Analysis and Design System Analysis3 Role of the Systems Analyst The company must decide whether to use an outsourcing option, develop software in-house, acquire a software package, develop user applications, or select some combination of these solutions The company must decide whether to use an outsourcing option, develop software in-house, acquire a software package, develop user applications, or select some combination of these solutions The decision will affect the remaining SDLC phases and your involvement as a systems analyst The decision will affect the remaining SDLC phases and your involvement as a systems analyst Management usually makes a determination after receiving written recommendation from the IT staff Management usually makes a determination after receiving written recommendation from the IT staff When selecting hardware and software, systems analysts often work as an evaluation and selection team When selecting hardware and software, systems analysts often work as an evaluation and selection teamevaluation and selection teamevaluation and selection team

Avicenna System Analysis and Design System Analysis4 Role of the Systems Analyst A team approach ensures that critical factors are not overlooked and that a sound choice is made A team approach ensures that critical factors are not overlooked and that a sound choice is made A team must include users, who will participate in the selection process and feel a sense of ownership in the new system A team must include users, who will participate in the selection process and feel a sense of ownership in the new system The primary objective of the evaluation and selection team is to eliminate system alternatives that will not meet requirements, rank the system alternatives that are feasible, and present the viable alternatives to management for a final decision The primary objective of the evaluation and selection team is to eliminate system alternatives that will not meet requirements, rank the system alternatives that are feasible, and present the viable alternatives to management for a final decision at the end of the systems analysis phase of the SDLC, you must apply financial analysis tools and techniques to evaluate development strategies and decide how the project will move forward at the end of the systems analysis phase of the SDLC, you must apply financial analysis tools and techniques to evaluate development strategies and decide how the project will move forward

Avicenna System Analysis and Design System Analysis5 Ascertaining Hardware needs To determine the hardware needs you should estimate the present and future workloads of a business, and the process involved in evaluating the ability of computer hardware to handle workloads adequately To determine the hardware needs you should estimate the present and future workloads of a business, and the process involved in evaluating the ability of computer hardware to handle workloads adequately

Avicenna System Analysis and Design System Analysis6 Ascertaining Hardware needs Steps used to determine hardware needs Steps used to determine hardware needs Inventory computer hardware currently available Inventory computer hardware currently available Estimate current and projected workload for the system Estimate current and projected workload for the system Evaluate the performance of hardware using some predetermined criteria Evaluate the performance of hardware using some predetermined criteria Purchasing, Leasing, or Renting Decision Purchasing, Leasing, or Renting Decision

Avicenna System Analysis and Design System Analysis7 Ascertaining Hardware needs Hardware Inventory Hardware Inventory Begin by inventorying what computer hardware is already available in the organization, to know what is on hand Begin by inventorying what computer hardware is already available in the organization, to know what is on hand When inventorying hardware check When inventorying hardware check Type of equipment: model number, manufacturer Type of equipment: model number, manufacturer Status of equipment operation: on order, operating, in storage, in need of repair Status of equipment operation: on order, operating, in storage, in need of repair Estimated age of equipment Estimated age of equipment Projected life of equipment Projected life of equipment Physical location of equipment Physical location of equipment Department or person responsible for equipment Department or person responsible for equipment Financial arrangement for equipment: owned, leased, rented Financial arrangement for equipment: owned, leased, rented

Avicenna System Analysis and Design System Analysis8 Ascertaining Hardware needs Estimating workloads Estimating workloads System analyst formulate numbers that represent both current and future workloads for the system so that any hardware obtained will possess the capability to handle current and future workloads System analyst formulate numbers that represent both current and future workloads for the system so that any hardware obtained will possess the capability to handle current and future workloads

Avicenna System Analysis and Design System Analysis9 Ascertaining Hardware needs Evaluating Hardware Evaluating Hardware Criteria for evaluating hardware Criteria for evaluating hardware Time required for average transactions: including time for input and output Time required for average transactions: including time for input and output Total volume capacity of the system: how much can be processed at the same time before problem arises Total volume capacity of the system: how much can be processed at the same time before problem arises Idle time of the central processing unit Idle time of the central processing unit Size of memory provided Size of memory provided Some criteria can be simulated; others cant be simulated and must be taken from manufacturer’s Some criteria can be simulated; others cant be simulated and must be taken from manufacturer’s

Avicenna System Analysis and Design System Analysis10 Ascertaining Hardware needs Purchasing, Leasing, or Renting Decision Purchasing, Leasing, or Renting Decision There are three options for obtaining computer equipment: There are three options for obtaining computer equipment: Buying Buying Leasing Leasing Renting Renting

Avicenna System Analysis and Design System Analysis11 Ascertaining Hardware needs Purchasing, Leasing, or Renting Decision Purchasing, Leasing, or Renting Decision There are advantages and disadvantages that should be considered for each of the three previous decisions There are advantages and disadvantages that should be considered for each of the three previous decisions Some of the more influential factors to consider in deciding which option is best for a particular installation include initial versus long term costs, whether the business can afford to tie up capital in computer equipment, and whether the business desires full control and responsibility for the computer equipment Some of the more influential factors to consider in deciding which option is best for a particular installation include initial versus long term costs, whether the business can afford to tie up capital in computer equipment, and whether the business desires full control and responsibility for the computer equipment

Avicenna System Analysis and Design System Analysis12 Ascertaining Hardware needs [2] Buying

Avicenna System Analysis and Design System Analysis13 Ascertaining Hardware needs [2] Leasing

Avicenna System Analysis and Design System Analysis14 Ascertaining Hardware needs [2] Renting

Avicenna System Analysis and Design System Analysis15 Sequence Summary The systems analyst’s role in the software development process depends on the specific development strategy The systems analyst’s role in the software development process depends on the specific development strategy By inventorying equipment already on hand and on order, systems analysts will be able to better determine if new, modified, or current computer hardware is to be recommended By inventorying equipment already on hand and on order, systems analysts will be able to better determine if new, modified, or current computer hardware is to be recommended Computer hardware can be acquired through purchase, lease, or rental Computer hardware can be acquired through purchase, lease, or rental factors to consider in deciding which option is best for a particular installation include initial versus long term costs, whether the business can afford to tie up capital in computer equipment, and whether the business desires full control and responsibility for the computer equipment factors to consider in deciding which option is best for a particular installation include initial versus long term costs, whether the business can afford to tie up capital in computer equipment, and whether the business desires full control and responsibility for the computer equipment

Avicenna System Analysis and Design System Analysis16 Sequence Summary In this Sequence we have In this Sequence we have Explained the role of systems analyst in the evaluation and selection of the development options Explained the role of systems analyst in the evaluation and selection of the development options Explained how to inventory and appraise current and proposed hardware Explained how to inventory and appraise current and proposed hardware Explained how to compare between Purchasing, Leasing, or Renting hardware Explained how to compare between Purchasing, Leasing, or Renting hardware

Avicenna System Analysis and Design System Analysis17 Reference [1] System Analysis and Design, Sixth Edition Authors: Gary B. Shelly, Thomas J. Cashman and Harry J. Rosenblatt, Authors: Gary B. Shelly, Thomas J. Cashman and Harry J. Rosenblatt, Publisher: SHELLY CASHMAN SEWIES. Publisher: SHELLY CASHMAN SEWIES. [2] system analysis and design, sixth edition Authors: Kenneth E. Kendall and Julie E. Kendall Authors: Kenneth E. Kendall and Julie E. Kendall Publisher: Prentice Hall Publisher: Prentice Hall