Lifting the lid on Business Rules - Robin Grace
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Lifting The Lid On Business Rules
Robin Grace
Principal Consultant
Business Analysis Practice
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At the end of a project what do
we deliver to the business?
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Business Rules
We Change and, or Automate Business
Rules.
We Deliver Business Rules Wrapped in a
Given Technology.
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Business Rules
A business rule is a rule of a business, company, or corporation. It is a rule that defines or constrains some aspect of business and always resolves to either true or false. Business rules are intended to assert business structure or to control or influence the behaviour of the business.
Business Rules Group, Defining Business Rules
What Are They Really?
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Types of Business Rules
• Definitions of business terms
• Facts relating terms to each other
• Constraints (also called "action
assertions")
• Derivations
Business Rules Group
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OK, now we know what we are looking for
but how do we go about finding them and
documenting them?
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Surround and Conquer
The art of using troops is this:
When ten to the enemy's one, surround him;
When five times his strength, attack him;
If double his strength, divide him
Sun Tzu, the Art Of War
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The Surround 1 2 3
Establish What’s Outside
Define a Boundary
Name The Area Inside
1
2
3
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Establish What’s Outside (Scope)
External
Agent
Business Area of the
Problem or Opportunity
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Establish What’s Outside
Delegate
Delegate Registration
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Divide
Delegate
Delegate Registration
4
Lift the Lid and Look Inside
4
Lift the Lid and Look Inside
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Divide
Delegate
Triggers
Work
Delegate
Registration
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Process Identification
Registered
Delegate
1
2
3
Register
Delegate
Registered
Delegate Last Name
Company Name
Delegate
4
Lift the Lid and Look Inside
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Reject Registration
Business Rules
• If the seminar is fully booked reject the
booking.
• Must have a delegate name and company
to complete the booking.
Venue Capacity
Booking Total
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Business Rules And Data
• Data exists only to support Business Rules
• Business Rule use, change, create and delete data
• Business Rules are embedded in the Logical Data Model
DELEGATE COMPANY Works For
Has Working For It
Delegate First Name
Delegate Last Name (M)
Has Working For It
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Registered
Delegate Register
Delegate
Registered
Delegate Last Name
Company Name
Delegate
Venue Bookings
Business Rules
If the seminar is fully booked reject the booking.
Must have a delegate name and company to complete the
booking.
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During The Project
Problem\Opportunity
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Technology Boundary
1) Draw A Boundary
2) Name The Area
3) Establish What’s Outside
4) Lift The Lid
Register Online
Delegate
Delegate Online
Registration System
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Lift the Lid on Register Online
Business Rules
• If the seminar is fully booked reject the
booking.
How do you want the system to do this?
This Seminar is fully booked
Error Message X
Close
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Business Rules • Must have a delegate name and company to complete the booking
How do you want the system to do this?
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Grace’s First Law Of Bugs
A missed or miss defined business rule
equals a BUG.
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Questions
Contact information
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