The scope of this Standard is restricted to human space flight missions and includes all crew activities in all phases of the life cycle (design, development, test, operations, maintenance), both inside and outside the spacecraft in space and on lunar and planetary surfaces.

Purpose

The purpose of this Standard is to provide uniform technical requirements for the design, selection, and application of hardware, software, processes, procedures, practices, and methods for human-rated systems.

NASA-STD-3001, Space Flight Human-System Standard, is a two-volume set of National Aeronautics and Space Administration (NASA) Agency-level standards established by the Office of the Chief Health and Medical Officer, directed at minimizing health and performance risks for flight crews in human space flight programs. Volume 1 of NASA-STD-3001, Crew Health, sets standards for fitness for duty, space flight permissible exposure limits, permissible outcome limits, levels of medical care, medical diagnosis, intervention, treatment and care, and countermeasures. Volume 2 of NASA-STD-3001, Human Factors, Habitability, and Environmental Health, focuses on human physical and cognitive capabilities and limitations and defines standards for spacecraft (including orbiters, habitats, and suits), internal environments, facilities, payloads, and related equipment, hardware, and software systems with which the crew interfaces during space operations.

Volume 1 of NASA-STD-3001 considers human physiologic parameters as a system, much as one views the engineering and design of a mechanical device. Doing so allows the humansystem to be viewed as an integral part of the overall vehicle design process, as well as the mission reference design, treating the human-system as one system along with the many other systems that work in concert to allow the nominal operation of a vehicle and successful completion of a mission. In Volume 2, the focus turns to human-system integration where the context is about how the human crew interacts with other systems, including the habitat and the environment. The focus is on performance issues during a mission — whether the human and the system can function together (within the environment and habitat) and accomplish the tasks necessary for mission success.

Volume 2 of NASA-STD-3001 is applicable to all human space systems. Developers of a system are to write design requirements tailored for their system that will ensure the end product meets the requirements of Volume 2. A supplementary NASA document, NASA/SP-2010-3407, Human Integration Design Handbook (HIDH), can help with the preparation of the systemspecific design requirements. The HIDH is a compendium of human space flight history and knowledge. It is organized in the same sequence as NASA-STD-3001, Volume 2, and provides useful background information and research findings. While the HIDH is not a Standard or a requirement, it can be a resource for preparing the program-specific requirements in accordance with section 3.2, Program-Specific Requirements [V2 3002] in this Standard. The HIDH can be used not only in the preparation of requirements but as a useful tool for designers.

This Standard addresses the equipment and operational interfaces that are common to both flight crew and ground personnel. System requirements fall into one of two categories:

• Requirements for the design of systems that directly interface with the flight crew (and only the flight crew) during a mission are in sections 3 through 12. These requirements include such topics as • environmental support systems, architecture, controls and displays, and operations.

• Requirements for the design of systems that are common between the flight crew and ground personnel are addressed in section 13. This section includes such topics as hatches, passageways, inspection points, and emergency equipment. Requirements for these "common" systems consider the unique characteristics between the two user populations.

This Standard contains fundamental, NASA-sanctioned information necessary for building human-rated spacecraft and is to be used for the development of lower level, program-specific requirements.