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 ∙ [email protected] ∙ www.sqe.com

mailto:[email protected]

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

[email protected]

[email protected]

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 I need to buy a book 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


must be…

environment



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


must be…

Customer UI, Sys to sys w inventory…

Purchase online



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



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



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


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 [email protected]

thanks!

twitter @ellengott

Nonfunctional Requirements: Forgotten, Neglected, Misunderstood

non-functional requirements: forgotten, neglected, and misunderstood

Software

product lifecycle

nonfunctional requirements

nonfunctional rqts

product capabilities

user story

agile coach

agile teams

credit card expiration