Non-Functional Requirements: Forgotten, Neglected, and Misunderstood

Concurrent Session‐ Better Software
11/12/2014 2:45 PM

"Non-Functional Requirements:
Forgotten, Neglected, and
Misunderstood"

Presented by:
Paul Reed
EBG Consulting

Brought to you by:

340 Corporate Way, Suite 300, Orange Park, FL 32073
888‐268‐8770 ∙ 904‐278‐0524 ∙ sqeinfo@sqe.com ∙ www.sqe.com

Paul Reed, senior associate with EBG Consulting, has led agile
teams working on complex products in companies of all sizes. Paul
excels at helping companies transition to agile by leveraging an
adaptive rollout strategy. He is a frequent conference speaker and
author of Developing Applications with Java and
UML and Developing Applications with Visual Basic and UML. A
practicing Certified ScrumMaster, Paul offers hands-on experience in
bringing real-world, sound architecture into the product lifecycle. His
experience and talents in business analysis and design, using a
variety of application lifecycle approaches, contribute to his ability to
get projects back on track to deliver business value.

© EBG Consulting, 2014 | www.ebgconsulting.com | www.DiscoverToDeliver.com 1
Nonfunctional Requirements:
Forgotten, Neglected, Misunderstood
Copyright © 2014 EBG Consulting, Inc.
12 November 2014
Paul Reed
www.ebgconsulting.com
www.DiscoverToDeliver.com

Facilitator, trainer, author, agile coach, architect, designer
Certified Scrum Master
Author: articles, books
eNewsletter: www.ebgconsulting.com
Blog: www.ebgconsulting.com/blog
paul@ebgconsulting.com
prreed@jacksonreed.com
Senior Associate
EBG Consulting
Paul Reed

give-away!

© EBG Consulting, 2014 | @ellengott
www.ebgconsulting.com | www.DiscoverToDeliver.com
4
product
requirements

product

“The product capabilities—
things that the product must do
for its users or allow its users to
do with the software…
the doing part of software”
The Software Requirements Memory Jogger
product requirements

product rqts
functional
nonfunctional

User Interface Action Data Control Environment
Quality
Attribute
7 product dimensions
functional
nonfunctional

your puzzle about
nonfunctional rqts?

user story
As a customer
I need to buy a book
so I can read it

story w 4 functional Ds
action
user
control
data
back of card
Secure payment
BR: Credit card expiration date
must be…
As a customer
paying with credit card
so I can read it

but wait… that’s not all!
environment interface quality
attribute

13
nonfunctional
rqts

The product
conforms to
physical properties
and technology
platforms
environment

environment

operational
physical properties
User Locations
Physical
Conditions
Composition Access Mode
Customer In store Noisy,
Help desk
Walk-up
terminal,
Mobile device
Touch screen,
Mouse,
Keyboard,
Price Scanner
Remote Varied Any Digital devices

back of card
action data
user
environment
control
Purchase online
Secure payment
must be…
environment
As a customer
so I can read it

technology platform
Software Hardware Standards
SafeSQL DBMS RowderRouter 2.4
BB Common Usage Std
2011.4.3
CommonBrowser V3.1 InfraScanner 878 Security Protocal-343
MidiMiddleware 8-989 RiverDesktop
MiniPrint-Mobile112 …

The product
interfaces to
users, systems,
and devices
interface

interface types
User
User
System
Device
Person
System
System
System

context diagram

IVR, GUI
dialog hierarchy
mockup/layouts
attribute specifications
user interface

file layout
data mapping
UAT (input, expected results)
sys to sys interface

message & data exchange details
device physical information
e.g., lifecycle maintenance, storage info
device to sys interface

back of card
action
interfaces
data
user
interface
environment
control
Secure payment
must be…
Customer UI, Sys to sys w inventory…Purchase online
As a customer
so I can read it

The product has
certain properties
that qualify its
operation and
development
quality attribute

quality attribute

quality attributes
Quality Attribute Options
Availability Purchasing up time
Interoperability with Inventory system
Performance Completing a purchase
Reliability Probability of failure
Security Customer and payment data
Usability Customers, Sales Staff

Tag Unique identifier
Gist Brief description summarizing requirement
Scale Unit of measure for requirement that
specifies all targets, constraints and
benchmarks
Meter Process or device used to establish location
of scale
Minimum Lowest possible level that must be achieved
Plan Desired level to attain
Wish Stretch level
planguage* for
quality attributes
*Adapted from:Tom Gilb

planguage
Usability.NoviceBuyer
Gist
Ability to complete a purchase with
minimal errors
Scale Count of errors
Meter
Count of errors during and up to 4
minute contiguous timeframe using
minimal documentation
Minimum No more than 2 errors
Plan No more than 1 errors
As a customer
so I can read it

planguage
ResponseTime.Purchase
Gist
Response time of app to confirmation of
purchase
Scale seconds
Meter
Elapsed time between pressing ‘enter’ to
confirm purchase details and beginning of
display of purchase confirm results
Minimum No more than 3 seconds
Plan No more than 1 second
As a customer
so I can read it

back of card
action
As a
a book paying with credit card
customer
I need to buy
so I can immediately have the book
7 Ds
data
user
interface
environment
quality
attribute
control
Secure payment
must be…
Purchase online
Confirmation in 3 secs
Customer UI, Sys to sys w inventory…

crosscutting
requirements
Apply to many stories including those
not yet in backlog | baseline | queue
Audit
Authorization
Authentication
Configuration
Exception handling
Globalization
Installation
Languages
Licensing
Localization
Security

34
collaborating

product partners
sponsor,
product champion,
SME, provider, adviser
user,
buyer,
adviser
builder,
adviser

voices for value
ROI,
time to market,
reputation
convenience,
cost,
trust
readiness,
efficiency,
testability

value
elicit
analyze
plan
collaborative discovery,
learning

views

7D’s in each view

holistic

training
Agile Requirements: Collaborating to Define and Confirm Needs
The Essential Product Owner: Championing Success Products
Mastering Business Analysis and Requirements
and more…
services
Planning and Analysis Workshops
Agile Jump Start
Agile Product Coaching
how EBG helps

email ellen@ebgconsulting.com
thanks!
twitter @ellengott
Nonfunctional Requirements:
Forgotten, Neglected, Misunderstood

Non-Functional Requirements: Forgotten, Neglected, and Misunderstood

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