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‹#› Het begint met een idee
SOFTWARE AND SUSTAINABILITY
( )
ILLUSTRATION: VU STRATEGIC PLAN, VISION 2015-2020
by Prof. Dr. Patricia Lago in the occasion of her Inaugural Speech15 January 2016
Source: tahoediamond, US Yellow is the brilliant, radiant sun that warms the coldest of hearts
Technical Economic
SocialEnvironmental
Source: P. Lago et al. “Framing Sustainability as a Software Quality Property”, ACM Communications, 2015.
‹#› Het begint met een idee Source: Philips SimplicitySustainable City Light Concept “Light Blossom”
Solar energy
Wind energy
Low power mode
Full intensity mode
PATRICIA LAGO ©2016
Lighting up the ParkUppsala , Sweden (2015)
Source: YouTubeLight up the dark: CityTouchPATRICIA LAGO ©2016
Lighting up the ParkUppsala , Sweden (2015)
57% improvement
in children’s mood
43% also better
sleeping pattern
PATRICIA LAGO ©2016
Authorities can manage and control LED streetlights remotely with this connected system [Photos courtesy of Philips] Philips CityTouch System
Smart lighting-control-
software
& LED technologyProportional
cost reductions
80% reduction
energy
consumption
PATRICIA LAGO ©2016
Smart and Sustainable
Source: 盧柏宇, Wikimedia CommonsAn artist's illustration of a smart city
9.7 billion connected things being used by 2020
Software as glue, and transformational power
PATRICIA LAGO ©2016
Source: Clicking Clean, Greenpeace, 2014
A collective global electricity consumption of 12% by
2017. (2015)
PATRICIA LAGO ©2016
The software industry and unsustainability
ENIAC Programmers Project (1946)Photo: Corbis
Steve Jobs unveils the iPhone (2007)Photo: Wikimedia Commons
Hardware
Energy-
unaware
software
Hardware optimizations are negated by
software inefficiencies [cf. Wirth’ Law]
Potential 87% energy savings with cloud
migration of legacy software [Berkeley Labs]
PATRICIA LAGO ©2016
Software technical challenges
User-centricQuality of Service
Elastic
Source: Nanda Piersma et al., 2015
LastingPATRICIA LAGO ©2016
“Technology is neither good nor bad; nor is it neutral.” Melvin
Kranzberg, 1986
Photo: Adapted from Rural Southern Story County by cwwycoff1
PATRICIA LAGO ©2016
SYSTEMIC IMPACT
ENABLING IMPACT
TECHNICAL
EC
ON
OM
IC
SOCIAL
EN
VIR
ON
ME
NTA
L
softwar
e
IMMEDIATE IMPACT
PATRICIA LAGO ©2016
Software architecture provides a bird’s eye view to address the
effects on the four dimensions of sustainability.
Photo: adapted from AnonymousPATRICIA LAGO ©2016
TECHNICALE
CO
NO
MIC
SOCIALE
NV
IRO
NM
EN
TA
L
IMMEDIATE
IMPACT
ENABLING
IMPACT
SYSTEMIC
IMPACT
ENERGY
SAVINGS
SCALABILITYCONFIGURABILITY
SOFTWARE SYSTAINABILITY ASSESSMENT METHOD © PATRICIA LAGO
WELL BEING
HEATHCARE
SAVINGS
ENERGY
COSTS
Smart
Lighting
PATRICIA LAGO ©2016
TECHNICALE
CO
NO
MIC
SOCIALE
NV
IRO
NM
EN
TA
L
IMMEDIATE
IMPACT
ENABLING
IMPACT
SYSTEMIC
IMPACT
SOFTWARE SYSTAINABILITY ASSESSMENT METHOD © PATRICIA LAGO
ELASTICITY
ENERGY
SAVINGS
CARBON
FOOTPRINT
SCALABILITY
PROVISIONING
COSTS
Video
streamin
g
software
PATRICIA LAGO ©2016
Energy consumption is software defined.
The cloud is there because software needs it, and if software is
bloat and data management inefficient, any optimization will be
just wasted.
Photo: Act Two-Um
PATRICIA LAGO ©2016
“Cost reduction is a given, but (software) transformation is critical”.
Rick Wright, KMPG Global Cloud Enablement Leader
GREEN LAB © S2GROUP
PATRICIA LAGO ©2016
Software engineering knowledge
IMAGE: ANONYMOUS
Energy efficient software
SOURCES: S2GROUP (2014) & ADS project BIG DATA 4 GREEN SOFTWARE (2015)
-25%
Software architecture design decisionsSOURCES: LAGO, LEWIS, PROCACCIANTI (WICSA 2014. ECSA 2015)
80B€How much?
-63.5%-1.9M€
Smart cloud governancePATRICIA LAGO ©2016
‹#› Het begint met een idee
“Software is eating the world”. Marc Andreessen, 2011
PHOTO: NIGEL PARRY
PATRICIA LAGO ©2016
ILLUSTRATION: THE GRIFFIN GOES GREEN, adapted from Massimiliano Nibid Graphics
PATRICIA LAGO ©2016
Source: tahoediamond, US Yellow is the brilliant, radiant sun that warms the coldest of hearts
Ik heb gezegd.
PATRICIA LAGO ©2016
