Managing the Networked EnterpriseMBA 501

WEEK 5: FEBRUARY 9

Methods of acquiring information systems Systems development life cycle Initiating systems

development Systems analysis and design

Today’s Lecture

• To distinguish between the typical stages involved in the development of a BIS

• To examine the management issues related to how BIS are acquired

• To examine some of the management issues related to the “real time enterprise”

Stages of the Systems Development Life CycleInitiationInput: evaluation of IT problems/needs

Output: Ideas for new system

Requirement (systems) analysisInput: Terms of reference from feasibility report

Output: Detailed requirements / system specification. DFDs, ERDs etc

System designInput: Requirements specification

Output: Detailed design specification (database, interface, data capture and storage etc)

System buildInput: Requirements and design specifications

Output: working software, manuals, documentation

Feasibility studyInput: Ideas for new system

Output: feasibility report and go/no go recommendation

ImplementationInput: Working system not tested by users

Output: signed-off operational system installed in all locations

MaintenancePost implementation review

System improvement

Considerations on System Implementation

Considerations on System Implementation

Structural Behavioural

The Sequence of Phases in the SDLC

• Structured analysis and design provides a systematic approach to developing systems:

– The model indicates that each step should be satisfactorily completed before the next begins

• Each step also has a link back to the previous stage, to correct errors/problems (eg. at the build stage, design errors or oversights may need to be corrected

• Analysis and design errors detected in the later phases of the SDLC cost more to fix than if detected in earlier phases

• Problems with highly structured methodologies has given rise to alternative models of systems development eg.

– Rapid Application Development and Extreme Programming – also known as Agile methods

Failure points for traditional “structured” methods of systems development

• Gap of understanding between users and developers• Tendency of developers to isolate themselves from

users• Quality measured by closeness of product to

specification rather than comparing deliverables to requirements

• Long development times• Business needs change during the development

process• What users get isn’t necessarily what they want

Reasons for the development of Rapid Application Development (RAD) / Agile

• RAD was launched in the early 90’s in response to 2 conditions– increased speed and turbulence of doing business– the ready availability of high-powered, computer-based

tools to support systems development and maintenance

• Problems with traditional waterfall method– long cycles - system may be obsolete before it is built

• RAD and similar systems based on prototyping became increasingly legitimate and are widely used in the mainstream– “Flavours” of RAD: Agile, Extreme Programming (XP), Joint

Application Development (JAD), Scrum, Lean Software Development

9

Initiation

Feasibility analysis, project planning,

Change and Risk Management

PROTOTYPING (analysis and design)

ANALYSIS

DESIGN

DEVELOP

TEST ANDREVIEW

Design, test,

specification

Prototype produced

Requirements specificationChange requests

Final implementationSystem and acceptance testingData migration and changeover

MaintenanceMonitoring and enhancing

The role of prototyping within the SDLC

MANAGEMENT ISSUES RELATED TO HOW BUSINESS INFORMATION SYSTEMS ARE ACQUIRED

Information system needs (requirements)

Business strategy

and policies

External business

environment

Internal business

processes

So you need some new software?Drivers for information systems acquisition

Typical software acquisition alternatives that must be evaluated

Bespoke

development

In-house

Outsourced

Off-the-shelf

(on-premise or SaaS)

Standard

Tailored

User-developed

Bespoke development• Where an information system is developed from scratch by an

IS professional (or team) to suit the business requirements of the application

– Can be either in-house or outsourced• Benefits

– Can be tailored to the precise business need– Proprietary system – may be a core business asset that competitors

cannot match• Difficulties

– Cost - the most expensive way to develop a new BIS– Time - notorious for time overruns, especially when using formal

structured methodologies (but Agile methodologies help to mitigate this problem)

– Quality – may be buggy (insufficient testing) or may not meet business requirements - often due to poor analysis of system requirements

Purchasing ‘off-the-shelf’ software (can be on-premise or SaaS)

• Direct purchase of a pre-written application used by more than one company

– written to offer broad functionality to suit a wide range of businesses

– Fewer bugs because software developed for commercial market– Cheaper than bespoke

• Difficulties– May offer features not needed– Requires business processes to be organized in a particular way– May have inflexible/unsuitable features (eg. specified # of

characters for customer code)

• Some packaged software can be tailored to some extent to suit particular business requirements (usually done by the vendor)

End-user developed software• Written by non-IS professionals - ie. the business users

themselves for “end-user applications”

• These apps are personal or departmental in nature and tend to be output or report-oriented

• Examples: spreadsheets, small databases, websites

• Advantage is that there will be good fit between the user’s requirements and the system

• Disadvantages

– there may be the use of inappropriate software tools

– hard to maintain (didn’t work to standards)

– buggy software because of

• lack of knowledge

• little or no design, planning or documentation

Other factors affecting software acquisition

• Where the software is generic (such as office productivity packages) organizations will purchase off-the-shelf

• Where the function of the software is at the “Unique” stage of the Software Maturity Model – more likely to be acquired via bespoke development

• Where niche software is needed for particular purposes or to create business advantage, then the bespoke approach is more common

• Organization size• In-house IS/IT expertise• IS/IT expertise among end-users• Linkages with existing applications software - amount of integration

required• Complexity of the required system• Uniqueness of the required system

Application complexity versus uniquenessHIGH

HIGHLOW

LOW

Complexity of application

Off-the-shelf

package

Bespoke

development

Off-the-shelf package or end-user development

Bespoke or end-user

development

Uniqueness of application

High complexity

Low uniqueness

Low complexity

Low uniqueness

High complexity

High uniqueness

Low complexity

High uniqueness

OPEN SOURCE SOFTWARE

Open source software

• A definition (from the Open Source Initiative

(OSI))

• "Open source promotes software reliability and quality by

supporting independent peer review and rapid evolution of source code. To be OSI certified, the software must be distributed under a license that guarantees the right to read, redistribute, modify, and use the software freely."

• Open source software is developed through public

collaboration between programmers

Videos – What is Open Source

UpStart Workshop - Episode 23 - What is Open Source Software?

– http://youtu.be/qyiUv7fCrjU

• UpStart Workshop - Episode 24 - What does it mean for open source software to be viral?

– http://youtu.be/cHel8oES68s

• Two other videos by Computer Floss on the same topic

– http://youtu.be/QfXkxkybQ4Q

– http://youtu.be/IF2Tg6k0Qa0

Open Source Software

• Open Source is about how software is developed, enhanced, and

managed

• The detailed Open Source definition (Open Source Initiative)

– The complete (uncompiled) source code must be distributed with any and all distributions

– Anyone can modify and redistribute the code for anyone else to use

– Licensed for these purposes (eg. under a GPL)

– It is the opposite of proprietary software, which is sold only in its compiled state – that is indecipherable by humans

So, is it free?

• It depends……

• UpStart Workshop - Episode 27 - Is Open Source Software Cost-Free?

– http://youtu.be/19Bf7VczqgE

• Definition of free software

• Customization, integration, installation, support,

maintenance, training

– Definitely not free – Red Hat’s revenue stream comes

from subscriptions to services that support the use of Linux (Open Source OS)

Drivers towards Open Source adoption

– Report from The Standish Group (registration needed)

1. Fashion2. Community3. Security4. Quality and reliability5. Initial cost6. Development speed7. Vendor initiative8. Support9. Skills

10. Ongoing costs

What are the risks and benefits of using open source software?

• UpStart Workshop - Episode 25 - What are

the risks and benefits of using open source

software?

• http://youtu.be/xJaRQL8xl6w

Business issues re Open Source• Now seen as “disruptive technology”

• Viability was underestimated

– Stats showing Server OS (Netcraft, January 2014 survey)

– Stats for browsers and desktop OS (W3Counter, December 2013)

• Microsoft underestimated the threat – normal rules of competition don’t apply

– Not possible to undercut the price

– Not possible to “buy the company” to get rid of competition

– Probably not possible to “buy the people”

– Negotiations / arguments are all done in public forums

• Better way is to find ways to work together and co-operate

– IBM is a prime example of an established company working within the open source movement

• Forrester’s 5 stages of open source adoption (Video of CodePlex panel) 6m

THE REAL-TIME ENTERPRISE

The Real-Time Enterprise

• “The essence of the “real-time enterprise” is that

organizations can know what they are doing at the moment, rather than waiting days, weeks or months for the information, as has been the case”

• Without a real-time feedback loop it is like driving a car

without being able to see the road

McNurlin, Sprague & Bui. Information Systems Management in Practice. Pearson.

2008

Some uses of real-time technology

• Enterprise nervous systems: to coordinate company operations eg. A

car arrives on a dealer’s lot – data is instantly available

• Straight-through processing: to reduce distortion in supply chains

• Communicating objects: to gain real-time data about the physical world (rg. RFID)

• Vigilant information systems: to move to a sense-and-respond culture (not just receiving, but acting)

• Real time customer relationship management: to automate decision making about customers

McNurlin, Sprague & Bui. Information Systems Management in Practice. Pearson.

2008

Real-time CRM

• Real-time response between a firm and its customer eg.

– Via web site

• Collaborative filtering (automated) – amazon.com

• Sense and respond (automated)

• Customer service (two-way, always-on)

• Advertising networks

– Via call centre

• Information needs to be available in real-time to call-centre workers (HUDS etc)

McNurlin, Sprague & Bui. Information Systems Management in Practice. Pearson.

2008

So why don’t all organization go “real-time”?

• Getting closer...

• But not so easy to achieve

– Expensive: sophisticated technology and a seamless integrated platform

needed

– Assessment needed to decide what really needs to be real-time and what

metrics should be used to help make automated decisions

– Needs care and attention from employees – “real-time expectations”

– Privacy considerations

McNurlin, Sprague & Bui. Information Systems Management in Practice. Pearson.

2008

CASE STUDY DISCUSSION

Friday February 16 Class

● Go to website: https://carsonmcpherson.ca/mba-501/ ● ● Review readings, etc.●● See you next week