Power Management Controls Project Update, August 2001 Bruce Nordman Lawrence Berkeley National Labor

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Power Management ControlsProject Update, August
2001Bruce NordmanLawrence Berkeley National
LaboratoryBNordman_at_LBL.govhttp//eetd.LBL.gov/C
ontrolssponsor California Energy
CommissionPublic Interest Energy Research (PIER)
Program
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Overview

• Recap of May, 2000 / Project Background
• Activities / Results Since
• Professional Advisory Committee, Institutional
  Review, Updated Project Plan, Device Assessment,
  User Interface Literature, Tentative
  Recommendations
• Next Steps
• Questions / Comments

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Synopsis

• Goal To save energy, increase enabling rates
  of existing power management capability in office
  equipment.
• Method Make power management more consistent
  and intuitive to users across all office
  equipment (via a voluntary standard).

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Standard PM Interface Elements

• Terms
• Symbols/Icons
• Indicators
• Operating Metaphors
• Scope Office Equipment ( Consumer
  Electronics)

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Institutional ReviewWho is Involved in Power
Management Controls

• Standards / Standards Committees (ISO/IEC)
• Graphical Symbols for Use on Equipment
• Indicator Lights
• Others
• Labeling Programs (e.g. ENERGY STAR)
• Trade Associations (e.g. ITIC)
• Manufacturers
• Technology Initiatives / Protocols

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Professional Advisory Committee (PAC)

• Provides project with Guidance, Review,
  Credibility
• Compaq
• Hewlett-Packard
• IBM
• Intel
• Microsoft
• Ricoh

• Samsung
• Sony
• Sun
• ITIC
• ENERGY STAR

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Topics High Priority, 1

• Basic symbols and switches buttons
• Basic indicators
• Changing power states
• Transition indicators
• Underlying archetype of power management
  behavior, including basic terms

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Topics High Priority, 2

• Controlled and controlling devices
• Remote indicators and controls
• Composite devices and diversity of low-power
  modes
• Power management schemes
• Behavior based on wake event type
• Linked behavior
• Interactions with non-power modes

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Topics Medium / Low Priority

• Disability
• Culture
• Temporary changes
• System status after power failure
• Terminology
• Miscellaneous

• Language
• Batteries
• Role of the term ENERGY STAR
• Self-monitoring

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Literature Insights

• Project Rationale
• Existing Designs
• Approach
• Design Principles
• Metaphor
• Modes
• General UI Lit. not specific to power controls

• Interactions / Transitions
• Indicator Lights
• Icons
• Norman / Macintosh

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Initial Recommendations

• Three basic power states On, Off, Sleep
• Power term (switch / indicator)
• Change the international standard symbols for
  on/off, standby, and sleep
• Green / Amber / Off for power indicators
• Sleep metaphor (and moon)

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Three Basic States

• On, Off, Sleep
• Within a state, device has consistent capability,
  behavior (e.g. state change)
• May have more states, but all mapped into forms
  of the basic three
• Hibernate problematic, but tentatively a form
  of Off

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The Term Power

• For indicators, switches/buttons
• Need standard translation
• Possible international word (voice)

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Power Symbols

• Drop as a symbol.
• Change meaning of from Standby to
  Power
• and too similar.
• Recommendation is most consistent with current
  usage on products.

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Indicators

• Use Green / Amber / Off for On / Sleep / Off
• Blinking only for transitions or non-power
  meanings
• Possible standard (optional) audio indications
• Cyberspace?

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Sleep - Metaphor and Symbol

• Sleep is most compelling metaphor, and has
  clear extensions (e.g. waking up).
• is already common and seems clear

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PC Sample State Diagram

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Next Steps

• More devices
• Other topics
• Outreach, esp. designers
• Testing

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Questions / Comments

• Process
• Recommendations