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Intro to Business Modeling
 

Intro to Business Modeling

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    Intro to Business Modeling Intro to Business Modeling Presentation Transcript

    • Business Modeling - Domain Analysis Most materials taken from the RUP textbook Chapter 8 and OOSE, pp. 101-106
    • Purpose of Business Modeling
      • To understand the structure and dynamics of the organization in which a system is to be deployed
      • To understand current problems in the target organization and identify areas for potential improvement
      • To ensure customers, end users, and developers have a common understanding of the target organization
      • To derive the system requirements to support the target organization.
      •  Note: all about the organization and not the application (directly).
    • Business Modeling (Domain Analysis)
      •  We look at WHY we look at business modeling before application development.
      • We will create a model of the ‘vision’ of the target organization –with its
        • Processes
        • Roles
        • Responsibilities
      • Three primary components: (Much more ahead)
        • Business Use Case Model, and
        • Business Object Model
        • Domain Model ( some: ‘exploratory domain model’)
        • We will discuss each in turn several slides ahead…
    • Why Undertake Business Modeling (Why do we care? – Slide 1)
      • The new standard for software development is to try to understand the business domain before or in parallel with development of an application.
        • Applications must ‘fit’ within the organization!
      • Business modeling is now a recognized, central part of development, and, in particular, facilitates the development of Requirements.
      • Business modeling now involves higher level people; those who can make decisions involving change ( not just those who ‘know’ the business well - SMEs).
      • According to the RUP, it is the first discipline that should be addressed and is key to acquiring key artifacts that will underpin much future work.
      • It is also a fundamental discipline in Inception phase.
    • Why Undertake Business Modeling (Why do we care?)
      • Very important to learn background knowledge so developers can communicate with users and make more intelligent decisions.
        • Essential for understanding customer’s problems and setting the scope for a development project that might follow.
      • Business Modeling (Domain Analysis) is a process by which a software engineer learns background information sufficient to be able to understand a problem at hand and to make good decisions during requirements analysis and other stages of the software engineering process.
      • The ‘Domain’ – a general field of business or technology.
    • Why Undertake Business Modeling (Why do we care?)
      • To perform business modeling (domain analysis), we need to gather information from a number of sources of information.
      • Seek experts in domain knowledge
      • Sources of Domain (Class) Knowledge:
        • high-level problem statements;
        • requirements;
        • expert knowledge of the problem space;
        • anything that describes the problem space and the desires and needs of the stakeholders.
          • Quarterly reports
          • Interviews
          • Questionnaires
    • Business Modeling - more
      • We need to often create a domain analysis document that contains the domain
        • Name
        • Glossary – terms used in the domain that are not a part of everyday language
        • General knowledge about the domain
        • Who are the customers, users, stakeholders…
        • Environment – system, equipment used
        • Tasks currently performed
        • Competing software….
      • Don’t develop too much information.
      • Brief summaries of what you have found plus references
    • Business Modeling - more
      • “ No serious software project should be undertaken without a sound domain analysis; a good knowledge of the domain of application considerably increases your chances of success.” p. 103, OOSE textbook.
      • Understand the domain? Easier to press on with requirements analysis to solve the problem – vision of a new/enhanced application.
      • Recognize that domain analysis never ends, as developers continue to supplement their domain knowledge as time continues.
    • Categories of Business Tools: e-business:
      • E-business reflects the nature of the business – represents what the business is all about.
      • Customer to business (C2B) – applications that allow you to order goods over the Internet, such as books
      • Business to business (B2B) automation of a supply chain across two companies
      • Business to customer (B2C): provision of information to (otherwise passive) customers, such as by distributing newsletters.
      • Customer to customer (C2C): applications that allow customers to share and exchange information with little input from the service provider, such as for auctions.
    • Terms
      • Business user – customers, vendors, partners – represented by business actors
      • Business processes – represented by business use cases; business use case realizations
      • Roles people play – represented by business workers
      • ‘Things’ organizations manage/produce represented by business entities / events organized into business systems.
    • Business Modeling Scenarios
      • Scenario 1 – Organization Chart
        • Build a simple org chart of business and its processes to get a good understanding of the application you are building.
        • Where does the application fit? To which organizations might it impact? …
          • Emphasis is on ‘the organization.’
        • Part of the software engineering process and part of the inception phase
    • Business Modeling Scenarios
      • Scenario 2 – Domain Modeling
        • Build a model of that information (banking, order management) that will be present at the business level.
        • Domain Modeling is typically part of the software engineering project and is performed during inception and elaboration phases – but is definitely started in inception and refined in elaboration.
        • We will develop a domain model – among other things in the next slide lecture plus assigned readings.
        • Recognize that the Domain Model is part of Domain Analysis (that is, Business Modeling)
    • Business Modeling Scenarios
      • Scenario 3 – One Business; Many systems.
        •  One business-modeling effort that is input to several other development projects.
        • The business models will as serve as inputs to building the architecture of the application family .
        • Individual applications may then use this model for individual projects, and will use this system as a baseline or domain, which may be then tailored or used in a dependency role.
        • This business modeling effort is a project by itself!
    • Business Modeling Scenarios
      • Scenario 4 – Generic Business Model (for different organizations)
        • Important if you are building a single , general model to be used to align several organizations in the business
          • used to reduce overall complexity - or at least understand how the different organizations might use the application.
      • Scenario 5 – New Business
        • Necessary business modeling for a new line of businesses
      • Scenario 6 – Revamp: Business Process Reengineering (BPR)
        • A complete redo of the way of doing business. Done in several discrete stages – envision new business, reverse engineer existing business, forward-engineer new business, and install new business…
        • A revolutionary approach to reorganization….
    • Primary Artifacts
      • Business Vision Document
        • Defines objectives and goals of the business modeling effort
      • Business Use Case Model
        • A model of the business’s intended functions.
        • Used as an essential input to identify roles and deliverables in the organization. (Use Rational Rose)
        • Will be very useful in your development use case modeling
      • Business Object Model (Business Analysis Model)
        • A model that realizes the business use cases . (Use Rational Rose) A lot of work…
    • Primary Artifacts (2)
      • Business Rules – policies/conditions that must be satisfied; heuristics during operations;
      • Business Glossary – definitions of important terms that are important to the business (acronyms, as ELOC, … commonly used terms.)
      • Others – selected…(several omitted are important, but we are concentrating on these  )
    • Business Models
      •  1. Business Use Case Model:
        • Contains business actors (roles external to the business such as customers) and business use cases (business processes)
      •  2. Business Object Model
        • Includes the business use case realizations
          • Includes interacting roles and entities involved.
      •  3. Domain Model - ahead
      • These are at higher levels of abstraction than the system use cases will be.
        • e.g. A class at business level represents a responsibility in an organization .
    • 1. Business Use Case Model
      • Simple in structure . See pp 151-152 in the RUP.
        • Shows relationship between business use cases – in general and business users (business actors).
        • Business Use Case Model is very similar to (System) Use Case Model but with different icons (semantics)
        • Each use case is identified and actors who interact with this and each business use case.
    • 2. Business Object Model
      • Much more detailed (pg 151-152)
        • Each business use case is realized with business actors and business entities.
        • Note icons used. (All documented in Visual Modeling with RR 2002 and UML )
        • You will not need the dashed lines, as these figures (pp. 151 and 152) are showing the relationship between the business modeling and the system models. (underlining implies objects)
        • Notice the syntactical difference between the icons in the System Use Case Model (bottom of pp 151-152) and the Business Use Case Models (middle of pp. 151-152).
    • More details on Business Object Model
      • Business Models and Entity Classes
        • A business entity that is to be managed by an information system will correspond to an entity in the domain model.
        • More ahead on domain modeling
        • Example entities might include:
          • Menu;
          • Work Schedule;
          • Food Order; …
    • The Domain Model
      • Part of Domain Analysis is developing models – Visual Models!
      • We develop a
        • Business Use Case Model
        • Business Object Model, and a
        • Domain Model.
      • All three of these will greatly assist in effective requirements analysis (gathering, capturing, and modeling user requirements).
      • Let’s look at the Domain Model.