Introduction Information Processing Needs System Design and Development

Introduction Information Processing Needs System Design and Development Information Systems for Managers Buying End-user Development Conclusions 1/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions Course roadmap Ch. 1 : Information Systems and the Role of General and Functionnal Managers Ch. 2 : Information Systems Defined Ch. 3 : Organizational Information Systems and Their Impact Ch. 4 : The Changing Competitive Environment Ch. 5 : Electronic Commerce: New Ways of Doing Business Ch. 6 : Strategic Information Systems Planning Ch. 7 : Value Creation & Strategic Information Systems Ch. 8 : Value Creation with Information Systems Ch. 9 : Appropriating IT-Enabled value Over Time Ch. 10 : Funding & Governance of Information Systems Ch. 11 : Creating Information Systems Ch. 12 : Information Systems Trends Ch. 13 : Security, Privacy & Ethics 2/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions Learning Objectives 1. To appreciate how complex it is to design and implement information systems and the stable, robust, secure technology at their core. 2. To articulate the advantages and disadvantages of custom software design and development versus acquisition of an off-the-shelf product. 3. To describe and be able to use the main methodologies for custom software design and development. Specifically, you will be able to identify the major phases of the system development life cycle (SDLC) and discuss its advantages and disadvantages. You will also become familiar with the prototyping approach and will be able to identify its principal advantages and disadvantages. 4. To describe the systems selection methodology and be able to use it to choose a pre-packaged software program for a specific organization. 5. To describe the reasons for the increasing prominence of end-user development in modern organizations and to articulate the benefits and risks of this approach to software development. 3/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 4/56 Introduction • Whether the information systems rely on custom-developed technology or off-the-shelf software, it is critical that you as a general or functional manager understand how information systems come to be. • While general and functional managers need not be concerned with hardware decisions, they must take part in the software design, acquisition, and implementation processes. • Involvement in information systems funding and design is essential because never before has a firm’s success depended so much on the use of the right software applications. • Deciding what the characteristics of the “right” applications are is a business decision that is based more on the business case and the understanding of the business processes the software will enable (or constrain!) than on any technical consideration

Introduction Information Processing Needs Risks & Rewards System Design and Development Buying End-user Development Conclusions 5/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 6/56 How Hard Can IT Be? • Challenge: The U. S. subsidiary of one of the major food producers in the world inked a deal to implement SAP (the leading enterprise system application), in an effort to centralize and rationalize operations across its nine divisions. The project required streamlining processes, standardizing software applications, and implementing the same organizational structure across the units • Question: How much time and how much money would you budget for this project? • Answer: six years and over $200 million

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 7/56 How Hard Can IT Be? • Challenge: A large hospitality company with over 2, 000 branded hotels developed a customer information system to enable its customer relationship management (CRM) strategy. The custom-developed functionalities of the software application at the heart of the information system included a property-management system, the loyalty and CRM applications, and the reporting modules. • Question: How much time and how much money would you budget for this project? • Answer: Two years and about $120 million.

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions Information Systems Development • Technology Development – The process of creating the core IT – IT can be acquired and integrated into existing infrastructure – IT can be custom-built by (or for) the organization • Information System Development – Successfully integrating the technology with the other components to achieve a working system 8/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions Three Approaches • Custom design and development – Implementing software that is expressly made to fit the unique needs of the organization • System selection and acquisition – Implement an off-the-shelf application that is mass produced by a vendor • End-user development – Implement a software application that is created by an end users, rather than the firms IS professionals 9/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 10/56 Advantages of Custom Development • Unique Tailoring – Molded to fit the unique features, characteristics, and needs of the firm that commissions them. – Off-the-shelf software may require adjustment (customization) to fit the organization • Flexibility and Control – Building from scratch allows the software to be molded into any form and modified at a later time

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions Advantages of Purchasing • Faster Roll-Out – Purchased software dramatically reduce the time it takes to obtain the software and to begin the implementation process • Knowledge Infusion – Software developers proactively seek out best practices in order to code their applications • Economically Attractive – The firm can capitalize on economies of scale created by the vendor • Software Quality – Mature off-the-shelf products have been heavily tested 11/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 12/56 Make and Buy • Modern firms are blending the custom development and selection approaches – First firms acquire off-the-shelf systems, then they modify them extensively – Few firms modify off-the-shelf applications slightly or not at all – Off-the-shelf applications are becoming larger and more complex, and require some modification to fit the purchasing firm

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Design and Development Methodologies 13/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 14/56 Systems Development Life Cycle • The SDLC approach is predicated on the notion that detailed justification and planning will reduce risk and uncertainty in systems development – Critical: Involvement from end-users and functional managers – Requires considerable time analyzing requirements up front – Requires that changes after the project has started be kept to a minimum

Introduction Information Processing Needs System Design and. Development Buying Principal Phases of the SDLC • Definition – Investigation – Feasibility Analysis – System Analysis • Build – System Design – Programming – Testing • Implementation – Installation – Operations – Maintenance End-user Development Conclusions 15/56

Introduction Information Processing Needs System Design and. Development Buying Principal Phases of the SDLC • Definition – Investigation – Feasibility Analysis – System Analysis • Build – System Design – Programming – Testing • Implementation – Installation – Operations – Maintenance End-user Development Conclusions 16/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 17/56 The Definition Phase • Concerned with clearly identifying the features of the proposed information system • Critical is the involvement of end-users and functional managers at this time • Resources (systems analysts) during this phase will identify and articulate the system requirements

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions The Definition Phase • Investigation Stage – Identify the business issues the system will pertain to – Formulate: • Main goals of the system • Scope of the design • Value proposition of the new system – Typically a very informal stage 18/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 19/56 The Definition Phase • Feasibility Analysis Stage – Used to ensure that organizational resources are put to the best use – Technical Feasibility: Evaluate whether the proposed system is viable from a technology standpoint – Operational Feasibility: Evaluate whether the Information System as planned will work in the organization – Economic Feasibility: Evaluation of the financial viability of the system • Perform a cost/benefit analysis in order to ensure the money spent will meet the firm’s financial hurdles.

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 20/56 The Definition Phase • Systems Analysis Stage – The process of identifying and articulating the system requirements – Systems analysts play a major role at this stage – Systems analysts must seek out and value the input of end -users and other stakeholders – The systems requirements document • • Details the inputs the systems will accept Details the outputs the system will produce Once approved (client sign-off), the requirements are “frozen” In a strict waterfall approach no further changes are allowed

Introduction Information Processing Needs The Build Phase • Definition – Investigation – Feasibility Analysis – System Analysis • Build – System Design – Programming – Testing • Implementation – Installation – Operations – Maintenance System Design and. Development Buying End-user Development Conclusions 21/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions The Build Phase • The most technical phase • The one by which people picture when they imagine how software is designed and developed • Key resources involved includes systems architects and programmers • The objective is to take the system requirements document and produce a robust, secure, and efficient application 22/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 23/56 The Build Phase • Systems Design Stage – Using the results from the definition phase, systems architects create the overall structure of the system – The output of this stage is a precise set of documents that programmers will employ to write code • Programming Stage – The process of translating the abstract software design into a set of instructions that can be executed by the hardware – Thorough and clear documentation is essential for support, maintenance, and upgrades • Testing – Programmers are constantly engaged in testing as they develop the system – Formalized testing of the completed application is an essential stage of the SDLC – The objective it to release the application when it is good enough, not when it is flawless

Introduction Information Processing Needs System Design and. Development System Design: Example Buying End-user Development Conclusions 24/56

Introduction Information Processing Needs System Design and. Development The Implementation Phase • Definition – Investigation – Feasibility Analysis – System Analysis • Build – System Design – Programming – Testing • Implementation – Installation – Operations – Maintenance Buying End-user Development Conclusions 25/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions The Implementation Phase • The process of ensuring that the technology is properly integrated with the other components of the information system • Extremely delicate time • Success at this stage requires: – Project management skills – Executive involvement 26/56

Introduction Information Processing Needs System Design and. Development The Implementation Phase • Installation Stage – – – The software is loaded on the production hardware and the databases are populated Typically occurs during slow periods for the organization Four major implementation approaches Buying End-user Development Conclusions 27/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Installation Approaches • Parallel Installation – Old and new systems are run for a time together, in parallel • Offers insurance against failure of new application • Most costly as it requires redundancy of efforts Old System New System 28/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Installation Approaches • Direct (Cutover) Installation – The old system is discontinued and the firm cuts over to the new one. – Most radical approach – Unavoidable in some cases (e. g. , Y 2 K) Old System New System 29/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Installation Approaches • Phased Installation – The new system progressively replaces the functionalities of the old one – Best suited for componentized or modular applications that can be rolled out in stages New System Old System 30/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 31/56 Installation Approaches • Pilot Implementation – Allows the firm to run the new system in one business unit or one of the firm’s departments before rolling it out completely – Well suited for multi-unit operations Old System New System

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 32/56 The Implementation Phase • End-user training – Occurs during the installation phase – Typically occurs in formal settings, such as classrooms or make-shift computer labs • Change Management – Process of smoothing the transition from the old system to the new work practices – User resistance and inertia are the biggest dangers

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions The Implementation Phase • Operations Stage – At this stage the system is up and running and the firm begins to use it – The system becomes a permanent asset of the organization • Maintenance Stage – Compiling errors requests – Prioritizing them – Implementing fixes and improvements • Functionality gaps may arise and can be closed by way of upgrades and additions 33/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Advantages of SLDC Approach • Provides a systematic approach to software development • Identifies roles and expectations of team members • Best-suited for large-scale projects • Designed for cost control • Enforces a means of communication between the project team and the project stakeholders 34/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Prototyping • Rooted in the notion that it is impossible to clearly estimate and plan complex information systems projects • Allows for flexibility and iteration in the design process • Enabled by tools that speed up the development process • Can be used internally within the SDLC as a way to seek input user input 35/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Prototyping Life Cycle • Requirements Definitions – Process of determining basic requirements – Degree of precision is less than with SDLC because requirements are not frozen • Initial Prototype – The first iteration of the software – At this point, the software can take many forms and can evolve in many directions 36/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Prototyping Life Cycle • Evaluation – Stakeholders review the prototype and provide feedback on the current design – Offer requests for enhancements and new functionality • Revision – Design and coding of the requested changes – New prototype is developed and is submitted for review 37/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Prototyping Life Cycle • Completion – – Occurs after multiple iterations The iterative evaluation and revision cycle stops The development team finalizes the system Documentation and testing occur prior to the formal release of the software 38/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Advantages of the Prototyping Approach • Speed • Closer to the users expectations: – The process require more user involvement – Multiple iterations structure user feedback • Enables the firm to experiment with new technologies • Best suited to smaller-scale projects 39/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions Limitations to the Prototyping Approach • The software is more likely to be lacking from a: – Security – Robustness – Reliability • Often less thoroughly tested and documented • May lead to unreasonable expectations • May lead to scope creep 40/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 41/56 Agile Development • A new breed of software development approaches has taken hold recently, in part due to the increasing popularity of prototyping • The software development approaches are collectively labeled as agile software development methodologies – Individuals and interactions over processes and tools – Working software over comprehensive documentation – Customer collaboration over contract negotiation – Responding to change over following a plan The State of Use for Agile Methodologies

Introduction Information Processing Needs System Design and. Development CMM • Capability Maturity Model (CMM) ranks software development organizations according to their ability to produce quality software by evaluating a set of standard processes thought to determine software quality. • The CMM is based on the core notion that reliable and consistent implementation of a specific set of processes represents a higher level of software development maturity and, as a consequence, ensures higher quality software products Buying End-user Development Conclusions 42/56

Introduction Information Processing Needs System Design and. Development Buying End-user Development Conclusions 43/56 Outsourced Development • Custom-designed software programs are increasingly outsourced • Virtual Development Teams – Teams that work together but are not physically located together • Superior cost/quality ratio – Superior quality products at a fraction of the cost of internal development

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions Purchasing Off-the-Shelf SW • The process of: – – – Definition Identifying Purchasing Implementing suitable for off-the-shelf software programs • Phases of the systems selection processes Typically spearheaded by management interest Investigation Feasibility analysis System analysis Formulate evaluation criteria Compile Short list of vendors Compile and distribute RFP Evaluate alternatives Negotiate contract Build System design (Customizations) Programming (Customizations) Testing Implementation Installation Operations Maintenance 44/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 45/56 The Definition Phase • Investigation Stage – Identify the business issues the system will be designed to address – Formulate goals and the scope of design • Feasibility Analysis Stage – Technical Feasibility: Evaluate whether the proposed system is viable from a technology standpoint – Operational Feasibility: Evaluate whether the Information System as planned will work in the organization – Economic Feasibility: Evaluation of the financial viability of the system

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions The Definition Phase • Systems Analysis Stage – Focus on determining the specific functionalities required of the proposed system • Formulate Evaluation Criteria Stage – Determine essential features & capabilities the system must have – Value adding features: • Capabilities that offer significant advantages for which the firm will pay a premium 46/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions The Definition Phase • Compile Short List of Vendors Stage – Identify potential vendors that meet the Request For Proposal (RFP) requirements • Compile and Distribute the RFP Stage – RFP identifies critical system requirements and expectations – Interested firms will respond to the RFP – An internal selection committee is formed 47/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions The Definition Phase • Evaluate Alternatives Stage – Determine a list of top vendors based upon the criteria developed earlier • Negotiate Contract Stage – Object is to draft and sign a contract that provides the needed solution and insulates the firm from future risk – Focus on cost, eventual liabilities, and control of intellectual property 48/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 49/56 The Build Phase • System Design (Configuration) Stage – The process of modifying through parameters, if necessary • Programming (Customization) Stage – The process of modifying the application by designing new functionality – Follows the system design and development approach – Necessary to accommodate specific needs of the organization • Testing Stage – Concerned with system performance rather than with the identification and correction of bugs

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions The Implementation Phase • Similar to SDLC implementation phase • Process change requirements are typically greater for off-the-shelf applications than custom software • Users are trained to operate the software • Change management may be substantial • The organization should plan to invest considerable resources 50/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions End-User Development • An umbrella term capturing the many ways in which knowledge workers, not IT professionals, create software • Examples: – Spreadsheet models (written in MS Excel) – Personal databases (MS Access) – Software programs built with user-friendly computer languages (Visual Basic for Application) 51/56

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 52/56 The Benefits of End-User Development • Increased Speed of Development – Projects can be completed independently by the end-user • End-user Satisfaction – When a user creates their own applications, they are more likely to be satisfied with the result • Reduced Pressure on the IS Function

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 53/56 The Risks of End-user Development • Unreliable Quality Standards – Because of the limited skill set and knowledge of most end users, the quality of their work varies dramatically • High Incidence of Errors – The focus on outcomes and rapid development increase the likelihood of errors • Continuity Risks – Often difficult for anyone but the individual who wrote the program to understand it, enhance it, or support it

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 54/56 The Recap • Introducing an organizational information system is a two -step process requiring technology development and the implementation process • Modern firms introduce new information systems using one of the following approaches: custom design and development, system selection and acquisition, or enduser development – In the first approach, IT professionals within the organization or who are contracted develop uniquely tailored software for the firm’s needs – In the second approach, the selection committee chooses an off -the-shelf application – In the third approach, it is the firm’s end users, rather than the IT professionals, who create the software

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions 55/56 The Recap • The main methodology for custom system development is the system development life cycle (SDLC). – The SDLC is articulated over three main phases— definition, build, and implementation—and nine stages. The primary limitation of the SDLC is the creation of substantial overhead and rigidity that limit the project team’s ability to address the inevitable changes • The prototyping methodology has emerged as a viable alternative to the SDLC. – Prototyping is rooted in the notion that it impossible to clearly estimate and plan in detail such complex endeavors as information systems design and development projects. – Instead the team is better served by staying nimble and iterating quickly through multiple designs to zero in on the optimal one.

Introduction Information Processing Needs System Design and Development Buying End-user Development Conclusions What we Learned 1. To appreciate how complex it is to design and implement information systems and the stable, robust, secure technology at their core. 2. To articulate the advantages and disadvantages of custom software design and development versus acquisition of an off-the-shelf product. 3. To describe and be able to use the main methodologies for custom software design and development. Specifically, you will be able to identify the major phases of the system development life cycle (SDLC) and discuss its advantages and disadvantages. You will also become familiar with the prototyping approach and will be able to identify its principal advantages and disadvantages. 4. To describe the systems selection methodology and be able to use it to choose a pre-packaged software program for a specific organization. 5. To describe the reasons for the increasing prominence of end-user development in modern organizations and to articulate the benefits and risks of this approach to software development. 56/56