NASA Space Flight Human System Standards

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NASA Space Flight Human System Standards
National Aeronautics and Space Administration

• Dane Russo, Tico Foley, Ken Stroud, Janis
  ConnollyNASA Johnson Space CenterHouston,
  Texas
• Barry Tillman, Lynn PickettLockheed
  MartinHouston, Texas

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NASA Needs Unique Human Factors Standards and
GuidelinesSpace environments create unique
human factors problems
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Problems with NASA-STD-3000

• Too general to be verified
• Too specific to apply to every NASA system

Too system specific
Not verifiable
Scale Level of Detail
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Problems with NASA-STD-3000

• Not kept up to date with changes in technology or
  human factors research findings only one update
  since 1989
• Does not fully cover medical needs

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Solution Space Flight Human Systems Standards
and Human Integration Design Handbook
Human Integration Design Handbook (HIDH)
These 2 documents capture the scope of
NASA-STD-3000.
Guide for the Implementation of the SFHSS.
Standard replaces NASA STD-3000 at the agency
level
Drive program human system requirements documents
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Space Flight Human Systems Standards Volumes 1
and 2 Cover Human Needs
Vol. 1 Health and Medical
Mission
Crew
Procedures
Equipment
Environment / Architecture
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Space Flight Human Systems Standards Volumes 1
and 2 Cover Human Needs
Vol. 2 Human Factors, Habitability, and
Environments
Mission
Crew
Procedures
Equipment
Environment / Architecture
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Space Flight Human Systems Standards Authorize
Program Specific Requirements

• Written at a global level
• Each human spaceflight program shall develop and
  standardize an anthropometry, biomechanics, and
  strength data set for both unsuited and suited
  crewmembers.
• Requires Each Program to Develop Human Factors
  Requirements Specific to That System
• Each human spaceflight program shall establish
  program-specific verifiable requirements that
  have been derived from the SFHSS and the HIDH.

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Human Integration Design Handbook Provides the
Data for Program Specific Requirements

• Based on NASA-STD-3000 revised and updated by
  subject matter experts
• Handbook format without shalls each program
  will create applicable shalls

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Human Integration Design Handbook Provides the
Data for Program Specific Requirements

• Anthropometry
• Sensorimotor Function
• Visual Perception
• Auditory Perception
• Cognition
• Organizational Behavior
• Training
• Workload
• Internal Atmosphere
• Water
• Contamination
• Acceleration

• Acoustics
• Vibration
• Ionizing Radiation
• Non-ionizing Radiation
• Architecture
• Lighting
• Food
• User Interfaces
• Medical
• Facility Management
• EVA

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How The New NASA Human Factors Documents Will
Work

• New programs are required to meet the Space
  Flight Human Systems Standards
• New programs use the Human Integration Design
  Handbook to write a set of verifiable
  requirements that will insure the system meets
  the standards
• Designers and analysts use the Handbook to meet
  the program requirements

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Status of the Documents

• Space Flight Human Systems Standards
• Volume 1 approved
• Volume 2 starting final review
• Human Integration Design Handbook
• Under development
• To be baselined by end of FY08
• On-line version available in FY09
• Handbook to be updated on regular basis (minimum
  every 2 years)

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Example Using the Documents

• Space Flight Human Systems Standard
• 5.2.1 Development of Data Set
• Each human spaceflight program shall develop and
  standardize an anthropometry, biomechanics, and
  strength data set for both unsuited and suited
  crewmembers.

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Example Using the Documents

• Human Integration Design Handbook
• 1. Select a population similar to the desired
  population that includes stature over several
  decades. Plot the average stature and determine
  a trend. Project the average stature to the
  desired future date.
• 2. Select a population similar to the one of
  interest for which a large, complete database is
  available. Create linear regression equations
  for the 50th percentile of each dimension based
  on 50th percentile stature and weight.
• 3. Estimate the future 50th percentile weight
  for the population by assuming a constant ratio
  between stature and weight and using the
  estimated future 50th percentile stature.

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Example Using the Documents

• Human Systems Integration Standards (for
  Constellation Program)

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Example Using the Documents

• Human Integration Design Handbook
• The following steps will be helpful to ensure
  that a design meets clearance requirements
• 1. Identify the critical physical clearance
  dimension (using mockups, if necessary).
• 2. Define possible human body movements and
  positions relative to the critical dimension
  (consider the task being performed, including
  possible errors in an emergency situation such
  as improper orientation for passage through a
  hatch).
• 3. Select the worst case body position(s) that
  would cause clearance to be an issue.

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Status of Documents

• Handbook
• Standard

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