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System Analysis

System Analysis and Design. System Analysis. - Mr. Ahmad Al-Ghoul. Learning Objectives. Explain the role of systems analyst in the evaluation and selection of the development options Inventory and appraise current and proposed hardware. Role of the Systems Analyst.

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System Analysis

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

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

  3. 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 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 • When selecting hardware and software, systems analysts often work as an evaluation and selection team System Analysis and Design System Analysis

  4. Role of the Systems Analyst • 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 • 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 System Analysis and Design System Analysis

  5. 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 System Analysis and Design System Analysis

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

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

  8. Ascertaining Hardware needs • 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 Analysis and Design System Analysis

  9. Ascertaining Hardware needs • Evaluating Hardware • Criteria for evaluating hardware • 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 • Idle time of the central processing unit • Size of memory provided • Some criteria can be simulated; others cant be simulated and must be taken from manufacturer’s System Analysis and Design System Analysis

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

  11. Ascertaining Hardware needs • Purchasing, Leasing, or Renting Decision • 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 System Analysis and Design System Analysis

  12. Ascertaining Hardware needs [2] Buying System Analysis and Design System Analysis

  13. Ascertaining Hardware needs [2] Leasing System Analysis and Design System Analysis

  14. Ascertaining Hardware needs [2] Renting System Analysis and Design System Analysis

  15. Sequence Summary • 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 • 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 System Analysis and Design System Analysis

  16. Sequence Summary • In this Sequence we have • 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 compare between Purchasing, Leasing, or Renting hardware System Analysis and Design System Analysis

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

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