Software
Architect
Requirement Engineering
Functional Requirement & Non-Functional Requirement

“Before software can be reusable, it first has to be usable.”
by Ralph Johnson

- Principal Software Architect at Telkom Indonesia
- Engineering Lead of Digital Product Engineering Chapter Digital Business & Technology
- Solutions Architect at Online Single Submission System (oss.go.id)
- Head of Engineer at PeduliLindungi
- Software Architect Lead at Telkom Indonesia
- Professional Mentor at Purwadhika Digital Technology School
- Cloud Computing Instructor at Google Bangkit
- Software Engineer
- Professional Lecture
- Researcher
- Speaker
- Author
Rony Setyawan, S.T., M.Kom., CCP., CSAP.

“As a rule, software systems do not work well until they have been used
and have failed repeatedly in real applications.”
by Douglas Crockford

Introduction of Requirements Requirements Processes Requirements Tools Q&A

Section One
Introduction of Requirements
Software requirements for a system are the description of what the system should do, the service or
services that it provides and the constraints on its operation
Software Requirement
- (1) A condition or capability needed by a user to solve a problem or achieve an objective.
- (2) A condition or capability that must be met or possessed by a system or system component to satisfy a
contract, standard, specification, or other formally imposed document.
- (3) A documented representation of a condition or capability as in 1 or 2.
Requirements

Software Crisis
Never Completed System Missed Deadlines Exceeded Budget
Difficult to modify It works but difficult to use Doesn’t t do all that required of it
Loss of trust from users
Section One
Introduction of Requirements

Without Requirement
I
N
V
A
L
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D
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E
Q
U
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R
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M
E
N
T
Section One
Introduction of Requirements

Invalid Requirement
Section One
Introduction of Requirements

Cost of Repair
Section One
Introduction of Requirements

Propagation of Errors
Section One
Introduction of Requirements

What do Requirement Define?
Section One
Introduction of Requirements

Product Requirement vs Process Requirement
Section One
Introduction of Requirements

Functional Requirement vs Non-Functional Requirement
Section One
Introduction of Requirements

Functional Requirement vs Non-Functional Requirement
Section One
Introduction of Requirements

Non-Functional Requirement
Section One
Introduction of Requirements

Section Two
Requirement Processes
Requirement Engineering

Requirement Processes
Section Two
Requirement Processes

Requirement Process Actors
Section Two
Requirement Processes
USERS
PROJECT LEADER
CUSTOMERS
REQUIREMENT
ANALYST
MARKET ANALYST
DEVELOPMENT
TEAM
TEST TEAM
REGULATORS
STAKEHOLDERS
MAINTENANCE
TEAM
PROJECT SPONSOR

Requirement Elicitation Sources
Section Two
Requirement Processes

Requirement Elicitation Techniques
Section Two
Requirement Processes
Interview Workshop
Brainstorming Focus Group
Persona Questionnaires &
Surveys
Benchmarking User Story

User Story
Section Two
Requirement Processes

Requirement Analysis
Section Two
Requirement Processes
Architecture
Design &
Allocation
Negotiation
Requirement
Classification
Derived
Requirement
Formal Analysis Feature Analysis

Requirement Classification
Section Two
Requirement Processes

Feature Analysis
Section Two
Requirement Processes

Why Requirement Modelling?
Section Two
Requirement Processes

Requirement Model?
Section Two
Requirement Processes
Use Case
Diagram
Activity Diagram
Data Flow
Diagram
Sequence
Diagram
Class Diagram
State Diagram

Data Flow Diagram
Section Two
Requirement Processes

DFD Rules
Section Two
Requirement Processes

DFD Rules & DFD Levels
Section Two
Requirement Processes

DFD Example
Section Two
Requirement Processes

DFD Example
Section Two
Requirement Processes

Use Case Diagram Example
Section Two
Requirement Processes

Class Diagram Example
Section Two
Requirement Processes

Activity Diagram Example
Section Two
Requirement Processes

Requirement Documentation
Section Two
Requirement Processes
https://docs.google.com/document/d/1KGk9ho-kAGcdm1VCxdMJjxjjRL3HKl9V/edit?usp=share_link&ouid=102956751844265755633&rtpof=
true&sd=true

Requirement Validation
Section Two
Requirement Processes
Acceptance Test / Scenario

Acceptance Test / Scenario Example
Section Two
Requirement Processes

Brainstorming Tools
Section Three
Requirement Tools

PrototypingTools
Section Three
Requirement Tools

ModellingTools
Section Three
Requirement Tools

CollaborationTools
Section Three
Requirement Tools

Business Needs Assessment Tools
Section Three
Requirement Tools

Data Analysis Tools
Section Three
Requirement Tools

Requirement Management Tools
Section Three
Requirement Tools

Any Question?

THANK
YOU