I did not want to use the rest of the article because it says that documents will be uploaded at a later date.
Draft NASA Constellation Program Management Directive Regarding Use of English Units of Measure
From: Muirhead, Brian K. (JPL-1900)[Caltech-JPL]
To: Geyer, Mark S. (JSC-ZV111); Kirasich, Mark A. (JSC-ZV111); Curry, John M. (JSC-ZV311); Cook, Stephen A. (MSFC-JP01); Woods, Daryl (MSFC-JP10); Phillips, Pepper (KSC-LX000); Horvath, Gregory T. (KSC-LXS00); Spivey, Jimmy L. (JSC-DA411); Hirshorn, Steven R. (JSC-DA811); Kearney, Lara E. (JSC-XA111); Davis, Jeffrey A. (JSC-XA111); Laurini, Kathy (JSC-ZA111); Dorris, Clinton (JSC-ZL111); Culbert, Christopher J. (JSC-ER111); Ivins, Marsha S. (JSC-CB611); Hansen, Lauri N. (JSC-ZL111); Laws, Burt A. (JSC-ZF111); Caram, Jose M. (JSC-EA311); Goforth, Montgomery B. (JSC-ZF311); Otterson, Timothy M. (JSC-ZF511)
Sent: Tue May 26 15:55:04 2009
Subject: New Management Directive on Units
All,
You've all heard the news that we're going back to English as the primary unit of measure. Attached is the draft Management Directive. We're planning on bring this MD to the CxCB on 6/5/09. Please let me know if you have any issues.
Brian
Brian K. Muirhead
CxP Chief Architect
Chief, SE&I Design Integration Office
brian.k.muirhead@nasa.gov
818 687 7003
-----------------------------------------------------------
CONSTELLATION PROGRAM MANAGEMENT DIRECTIVE
CxPM DIRECTIVE NO. XXX
DATE X/XX/2009
TO: Distribution
FROM: Jeff Hanley, Manager, Constellation Program
SUBJECT: Use of a hybrid system of units, and English as the primary system of measure for the Constellation Program, Projects, Systems and Missions.
OFFICE OF PRIMARY RESPONSIBILITY: SE&I.
1. PURPOSE: This directive establishes a hybrid system of English and International System of Units (commonly known as SI, Systeme Internationale, and Metric) with English being the primary and default unit of measure of and throughout the Constellation Program (CxP). Cases of mixed use of English and SI units will be continued in specific cases as defined in this directive.
2. SCOPE: This directive applies to all constituents and aspects of the CxP, including organizations, personnel, missions, systems, products, processes, plans, operations, communications, data, documents, hardware, software, contracts, contractors, vendors, and deliverables.
3. RATIONALE: This directive defines and communicates a consistent approach to the use of engineering units throughout CxP. The program conducted an extensive and detailed effort to implement a primary SI units based system for design, analysis, test and operations while allowing English units for most of the hardware. This effort looked at various implementation strategies and worked the implementation details to the point of having workable implementation plans in all the projects. However, the cost estimates to achieve these plans significantly exceeded the resources that could be made available in the critical years. Therefore, given budget constraints and the need for consistent practice of units throughout the CxP lifecycle to minimize risks and to achieve mission success, the program is revising its previous management directive to a primarily English units based program with limited usage of SI as defined in the MD. This MD constitutes the basis for the waiver to NASA policy directing the usage of SI.
To: Geyer, Mark S. (JSC-ZV111); Kirasich, Mark A. (JSC-ZV111); Curry, John M. (JSC-ZV311); Cook, Stephen A. (MSFC-JP01); Woods, Daryl (MSFC-JP10); Phillips, Pepper (KSC-LX000); Horvath, Gregory T. (KSC-LXS00); Spivey, Jimmy L. (JSC-DA411); Hirshorn, Steven R. (JSC-DA811); Kearney, Lara E. (JSC-XA111); Davis, Jeffrey A. (JSC-XA111); Laurini, Kathy (JSC-ZA111); Dorris, Clinton (JSC-ZL111); Culbert, Christopher J. (JSC-ER111); Ivins, Marsha S. (JSC-CB611); Hansen, Lauri N. (JSC-ZL111); Laws, Burt A. (JSC-ZF111); Caram, Jose M. (JSC-EA311); Goforth, Montgomery B. (JSC-ZF311); Otterson, Timothy M. (JSC-ZF511)
Sent: Tue May 26 15:55:04 2009
Subject: New Management Directive on Units
All,
You've all heard the news that we're going back to English as the primary unit of measure. Attached is the draft Management Directive. We're planning on bring this MD to the CxCB on 6/5/09. Please let me know if you have any issues.
Brian
Brian K. Muirhead
CxP Chief Architect
Chief, SE&I Design Integration Office
brian.k.muirhead@nasa.gov
818 687 7003
-----------------------------------------------------------
CONSTELLATION PROGRAM MANAGEMENT DIRECTIVE
CxPM DIRECTIVE NO. XXX
DATE X/XX/2009
TO: Distribution
FROM: Jeff Hanley, Manager, Constellation Program
SUBJECT: Use of a hybrid system of units, and English as the primary system of measure for the Constellation Program, Projects, Systems and Missions.
OFFICE OF PRIMARY RESPONSIBILITY: SE&I.
1. PURPOSE: This directive establishes a hybrid system of English and International System of Units (commonly known as SI, Systeme Internationale, and Metric) with English being the primary and default unit of measure of and throughout the Constellation Program (CxP). Cases of mixed use of English and SI units will be continued in specific cases as defined in this directive.
2. SCOPE: This directive applies to all constituents and aspects of the CxP, including organizations, personnel, missions, systems, products, processes, plans, operations, communications, data, documents, hardware, software, contracts, contractors, vendors, and deliverables.
3. RATIONALE: This directive defines and communicates a consistent approach to the use of engineering units throughout CxP. The program conducted an extensive and detailed effort to implement a primary SI units based system for design, analysis, test and operations while allowing English units for most of the hardware. This effort looked at various implementation strategies and worked the implementation details to the point of having workable implementation plans in all the projects. However, the cost estimates to achieve these plans significantly exceeded the resources that could be made available in the critical years. Therefore, given budget constraints and the need for consistent practice of units throughout the CxP lifecycle to minimize risks and to achieve mission success, the program is revising its previous management directive to a primarily English units based program with limited usage of SI as defined in the MD. This MD constitutes the basis for the waiver to NASA policy directing the usage of SI.
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