Sunday, April 1, 2012

Readiness-based sparing … Semper Paratus?

U. S. Coast Guard H-65 Dolphin helicopter.[i]  (Photo courtesy of U. S. Coast Guard)
Semper Paratus (Always Ready) is the U. S. Coast Guard’s motto and is a fitting lead-in to discussing what the term “readiness” in readiness-based sparing really means.  For the Coast Guard’s fleet of 101 H-65 Dolphin aircraft assigned across 17 air stations around the U. S., readiness means the aircraft and crew are able to launch and perform any number of rescue and/or law enforcement missions.[ii]  This readiness enables the Coast Guard to rapidly respond to emergencies, such as in August and September 2005 when the Coast Guard deployed 49 rescue helicopters to the Gulf Coast region in response to Hurricane Katrina.[iii]
A more recent example of how critical system readiness can be occurred on 24 March 2012 when the 6 crewmembers aboard the International Space Station were forced “to take precautionary shelter in their respective Soyuz vehicles, about 30 min before TCA (Time of Closest Approach) of a small piece of Russian Cosmos 2251 satellite debris which passed by the ISS at 2:38:33am EDT.”[iv]  Fortunately, the Soyuz capsules were ready and able to serve as emergency shelters for the crew; and even more fortunately, the “space junk” safely passed by the International Space Station and the crew resumed its normal duties.
A final example of critical system readiness was the emergency response to the 29 January 2012 multi-vehicle accident that occurred on I-75 near Gainesville, FL.[v]  When fog and smoke from a brushfire suddenly reduced roadway visibility, 19 passenger vehicles and trucks became involved in a massive accident.  Ultimately, 11 individuals lost their lives and 21 others were hospitalized due to the accident which tasked emergency responders from two different counties.[vi]  The nearness of well-equipped trauma care, a recall of critical care staff, and sufficient emergency transportation were all factors cited for the high survival rate of victims who reached local hospitals.
Obviously, system readiness is vital in many different contexts.  In fact, readiness was one of the most frequently used words in the readiness-based sparing definitions that we reviewed for the previous post.  So what factors must come together to ensure a system’s readiness?  The Highway Mass Casualty Readiness Project of the National Association of State Emergency Medical Services Officials (NASEMSO) provides an insightful glimpse into the world of medical readiness. 
“The EMS Incident Response and Readiness Assessment (EIRRA) is a self-assessment tool designed to measure the level of emergency medical services (EMS) preparedness for response to a highway mass casualty incident (MCI).  It is intended to be used by state, regional and local EMS agencies to evaluate the system’s capability to respond to large scale emergency incidents.”[vii]
The EIRRA self-assessment includes seven different factors in its readiness assessment process.  These factors are:
1.      Personnel“There are sufficient numbers, types and distribution of prehospital emergency medical and support personnel who are well-trained and supported for responding to mass casualty incidents.”[viii]
2.      Infrastructure – “The emergency infrastructure includes the necessary communications, transportation, equipment and information sharing technology resources for assuring the best possible emergency response to mass casualty incidents.”[ix] 
3.      Emergency Care System – “The emergency care system has adequate availability of well-prepared emergency response teams and medical facilities, including a well-developed specialty care system.”[x]
4.      Public Awareness and Notification System – “There is an effective public awareness and notification system in place, which includes preincident education of the public as well as notification during the incident.”[xi]
5.      Evaluation – “There is an effective evaluation system providing for a thorough review of the performance of emergency responders at mass casualty incidents.”[xii]
6.      Mass Casualty Planning – “Mass casualty planning has been thorough and is well documented.”[xiii]
7.      Governance – “In the case of mass casualty incident response, the roles and lines of authority are clearly defined among governing bodies, including local, tribal, state, federal and international.”[xiv]
For a final view of system readiness, we turn to the Department of Defense Dictionary of Military and Associated Terms[xv] which defines unit-level readiness as “The ability of United States military forces to fight and meet the demands of the national military strategy…. The ability to provide capabilities required by the combatant commanders to execute their assigned missions. This is derived from the ability of each unit to deliver the outputs for which it was designed.”
The U. S. Air Force uses the Status of Resources and Training System (SORTS) to measure and report its unit-level readiness across four areas, which include:
1.      Personnel“Units compute the personnel [readiness] … based on the percentages of total and critical personnel available to accomplish the unit’s required wartime mission.”[xvi]
2.      Equipment and Supplies On-Hand“is used to indicate the resource status of authorized equipment and supplies required to support the unit’s wartime mission(s)….”[xvii]
3.      Equipment Condition“is used to measure the combat essential and support equipment that can be made ready within the unit’s response time to undertake the unit’s assigned wartime mission…. [and] is also used to indicate maintenance and equipment reliability, serviceability and operational status of assets.”[xviii]
4.      Training“Training measurement is used to indicate the status of training needed to support the mission for which a unit is designed….”[xix]

Although the missions are different, the NASEMSO EIRRA and the U. S. Air Force SORTS systems both view readiness as a function of personnel, materiel, equipment, and training assessed against a standardized plan which is routinely communicated to higher levels of management.  Through these readiness assessment systems, managers are able to assess the ability of their systems to perform their assigned missions – such as the Coast Guard’s H-65 Dolphin helicopters performing rescue and/or law enforcement missions.
Clearly, while there are many factors that need to be considered in making a readiness assessment, having sufficient quantities of materiel and fully operable equipment are two key readiness factors (as the January 2012 I-75 mass casualty incident attests to).  Of course, for our particular focus – readiness-based sparing – the most relevant portion of these readiness assessment systems is materiel supportability which directly contributes to equipment availability. 
In the next posting, we’ll take a closer look at availability which was another frequently mentioned term in the sample of readiness-based sparing definitions that we examined last week.


[i] U. S. Coast Guard photo, downloaded from http://www.uscg.mil/hq/cg7/cg711/h65s.asp on 18 March 2012.
[ii] U. S. Coast Guard Office of Aviation Forces (CG-711).  HH/MH-65C Dolphin.  Downloaded from http://www.uscg.mil/hq/cg7/cg711/h65s.asp on 18 March 2012.
[iii] Government Accountability Office.  Observations on the Preparation, Response, and Recovery Missions Related to Hurricane Katrina.  GAO-06-903; Washington, DC: Government Printing Office, 2006.  (Page. 35)  Downloaded from http://www.uscg.mil/history/docs/KatrinaGAO06903.pdf on 25 March 2012.
[iv] National Aeronautics and Space Administration.  ISS On-Orbit Status 03/24/12.  Downloaded from http://www.nasa.gov/directorates/heo/reports/iss_reports/2012/03242012.html on 25 March 2012.
[v] CBS News.  Cause of deadly Florida crash sought, 30 January 2012.  Downloaded from http://www.cbsnews.com/8301-505263_162-57368048/cause-of-deadly-florida-crash-sought/ on 26 March 2012.
[vi] Geggis, Anne, “Busiest day ever at Shands trauma center,” The Gainesville Sun, 30 January 2012.  Downloaded from http://www.gainesville.com/article/20120130/ARTICLES/120139955/-1/TOPIC0324?template=printpicart on 27 March 2012.
[vii] National Association of State EMS Officials.  EMS Incident Response and Readiness Assessment (EIRRA).  Falls Church, VA: May 2011.  (Page 1)  Downloaded from http://www.ems.gov/pdf/2011/July2011/8-EMS.Incident.Response-Readiness.Assessment.(EIRRA).pdf on 23 March 2012.
[viii] NASEMSO, page 9.
[ix] NASEMSO, page 16.
[x] NASEMSO, page 34.
[xi] NASEMSO, page 37.
[xii] NASEMSO, page 41.
[xiii] NASEMSO, page 44.
[xiv] NASEMSO, page 51.
[xv] U. S. Department of Defense.  Department of Defense Dictionary of Military and Associated Terms.  Joint Publication 1-02.  Washington: 8 November 2010 (as amended through 15 January 2012).  (Page 277)  Downloaded from http://www.dtic.mil/doctrine/new_pubs/jp1_02.pdf on 18 March 2012.
[xvi] Department of the Air Force.  Air Force Guidance Memorandum to AFI 10-201, Status of Resources and Training System.  Washington: HQ USAF A3/5, 25 October 2011.  Attachment, Air Force Instruction 10-201, Status of Resources and Training System.  Washington: HQ USAF A3OR, 13 April 2006.  (Page 58)  Downloaded from http://www.e-publishing.af.mil/shared/media/epubs/AFI10-201.pdf on 23 March 2012.
[xvii] Department of the Air Force, p. 73.
[xviii] Department of the Air Force, p. 125.
[xix] Department of the Air Force, p. 177.

Saturday, March 17, 2012

The quest for readiness-based sparing.… What are its essential characteristics?


Key descriptive characteristics found in ten different definitions of readiness-based sparing.  Each word’s font size reflects its relative frequency in the sampled readiness-based sparing definitions.  Wordle courtesy of wordle.net.

It’s a phrase that service parts managers in the aerospace and defense; maintenance, repair, and overhaul; and remanufacturing communities use, but you’ll never find it in a dictionary.  Yet each of these managers has their own notion of what the term readiness-based sparing means.
Last week’s blog offered the following definition of readiness-based sparing from the Supply Chain Integration organization within the Office of the Assistant Secretary of Defense (Logistics and Materiel Readiness) website:
“Readiness Based Sparing (RBS) is the practice of using advanced analytics to set spares levels and locations to maximize system readiness.” [i]
Short but sweet.
This week’s blog takes a different approach, reviewing U.S. Department of Defense regulations, inventory textbooks, technical reports and academic papers for their definitions of readiness-based sparing.  The results were surprising.  After reviewing several dozen sources, the ten best definitions were picked for closer examination.  These definitions came from a variety of services and organizations. (See the selected references at the end of this article for a complete listing of these sources.)
These ten definitions totaled just under 1000 words although some definitions were longer than others.  Key words and phrases describing the essential characteristics of readiness-based sparing were pulled from each definition, their terminology standardized, and then their frequency of appearance tallied.  Although this approach isn’t very scientific, and was certainly influenced by my interpretive skills, the following bar chart summarizes the most frequently referenced readiness-based sparing characteristics. 


The most frequently referenced readiness-based sparing characteristics in ten sampled references.

Not surprisingly, characteristics such as availability, system, cost, readiness, sparing, multi-indenture, and multi-echelon figure prominently in the Wordle as well as the frequency chart.  This consistency is encouraging and gives us a better idea of what characteristics are important to the community of spares managers and practitioners involved with readiness-based sparing.
Reviewing all of these technical documents for their definition of readiness-based sparing was certainly educational.  Possibly the most comprehensive definition of readiness-based sparing in the sampled documents came from a technical report written for the U.S. Coast Guard[ii]:
“Readiness-based sparing [RBS] is the process by which inventories are sized to support a major system or principal end item at levels that meet the customer's availability goal for operating that system or end item.  Appropriately, RBS is sometimes referred to as sparing to availability.  An RBS model is an inventory requirements model that sets levels that either minimize costs while meeting a system or end-item operational availability (Ao) goal or maximize the system or end item's Ao within a dollar limit….
“… [A]n RBS model seeks the best combination of item EBOs [expected backorders] in terms of the availability of the system or end item being supported….
“Other aspects of RBS modeling are multi-echelon and multi-indenture capabilities.  If an RBS model has a multi-echelon capability, its selection process considers the best location for that spare among all the echelons of supply supporting the system or end item. ….
“If an RBS model has a multi-indenture capability, its selection process considers the position of the item in the system or end item's configuration….
“The multi-indenture capability is incorporated by considering hierarchy in the computation of a spare's operational availability improvement.  Once the marginal analysis algorithm selects a spare in a hierarchical chain, the ratios for all items in the chain must be adjusted to reflect their new operational availability contribution.”
Well, with a good definition of readiness-based sparing in hand, future installments of this blog will go into more depth about these key descriptive characteristics and what they mean to a service parts manager.  For now, at least, we have a convenient starting point.

One final note …. In the 13 March 2012 on-line edition of the Washington Post, there was a very interesting article (at least for aviation buffs and logisticians J) titled “Aging DC-3s serve as ‘buses of the jungle’ in Colombia” by Juan Forero.[iii]  It was about the fleet of ageless DC-3 cargo aircraft (aka the C-47 Skytrain in its military designation) that ply the airways over Columbia.  Talk about a logistical challenge … try keeping 60 to 70 year old aircraft in a flyable status.  This article was definitely worth the read and the accompanying photos are very interesting too!  Here’s a link to the article:

http://www.washingtonpost.com/world/the_americas/aging-dc-3s-serve-as-buses-of-the-jungle-in-colombia/2012/03/07/gIQATlOz6R_print.html

In case you are not familiar with the DC-3/C-47, here is a picture of one.[iv]


     Douglas C-47 (photo courtesy of the U.S. Air Force)


Addenda (25 July 2016) - At this link, there is an excellent short video from the Smithsonian Channel about why DC-3s / C-47s are still flying ("Why the DC-3 Continues to Fly Decades After World War II"). 

http://www.airspacemag.com/videos/category/new-label/why-the-dc-3-continues-to-fly-decades-after/#Ve4Jqgggo7hac4qv.99

Selected Readiness-Based Sparing References

1.   Department of the Army.  Logistics Provisioning of U.S. Army Equipment.  Army Regulation 700–18.  Washington, DC, Headquarters, 20 September 2009.  (Page 3)  Downloaded from http://www.apd.army.mil/pdffiles/r700_18.pdf on 6 March 2012.
2.   Department of the Navy.  Operational Availability of Equipments and Weapons Systems.­  OPNAV INSTRUCTION 3000.12A.  Washington, DC, Logistics Planning and Innovation Division (N40), 2 September 2003.  Enclosure 1: Operational Availability Handbook: A Practical Guide for Military Systems, Sub-Systems and Equipment; June 2003.  Project Manager James G. Smith, Deputy Chief of Naval Operations, Fleet Readiness & Logistics (DCNO (FR&L)), Logistics Planning and Innovation Division (N40), Strategic Planning, Logistics Processes and Acquisition Logistics Cell (N401A). (Page 14) 
3.   Department of the Navy.  Readiness Based Sparing.  OPNAVINST 4442.SA.  Washington, DC, Deputy CNO Fleet Readiness and Logistics (N4), 15 October 2011.  (Page 1)  Downloaded from http://doni.daps.dla.mil/Directives/04000%20Logistical%20Support%20and%20Services/04-400%20Supply%20and%20Material%20Services/4442.5A.pdf, 4 March 2012.
4.   Geis, Mark B., et al, Implementing Readiness-Based Sparing in the Marine Aviation Logistics Support Program: Readiness Implications.  Alexandria, VA, Center for Naval Analyses, October, 2003.  (Page 34) Downloaded from http://192.189.236.117/research/tags/readiness-based-sparing, 4 March 2012.
5.   Gue, Kevin R.  Data and Models to Build Supply Blocks for Deploying Marine Corps Units. Monterey, CA:  Naval Postgraduate School, 7 October 1998. (Pages 3, 5)  Downloaded from http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.36.9441&rep=rep1&type=pdf, 5 March 2012.
6.   Menyhert, Carl F.  An Evaluation of the United States Army SESAME and Swedish OPUS VII Provisioning Models.  Master’s thesis, Naval Postgraduate School, Monterey, CA.  December 1983.  (Page 16)  Downloaded from http://www.dtic.mil/docs/citations/ADA137169 10 December 2009.
7.   Rodriguez, Christopher M. and Kevin Downer.  VMetric Spare Parts Optimization Model Validation. Report CG-D-06-98.  Groton, CT, U. S. Coast Guard Research and Development Center, July 1997.  (Page 3)  Downloaded from http://www.dtic.mil/docs/citations/ADA339593 2 April 2010.
8.   Sakulich, Capt Timothy J. and Lt Col Douglas J. Blazer.  Aircraft Availability Model (AAM) Weapon System Availability Targets.  Wright-Patterson AFB, OH: AFLC/MMM, 26 August 1988 (ADA 198832). (Page 1) Downloaded from http://www.dtic.mil/dtic/tr/fulltext/u2/a198832.pdf 20 December 2011.
9.   Slyman, George L. and Dennis L. Zimmerman.  Improved Inventory Models for the United States Coast Guard Requirements Determination Process.  LMI Report CG201RD6.  Bethesda, MD: Logistics Management Institute, October 1993.  (Pages A-1 – A-4) Downloaded from http://www.dtic.mil/docs/citations/ADA284294 on 8 March 2012. 
10. Spignesi, Nicholas A.  Implementing Readiness Based Sparing in the United States Marine Corps by Analyzing the United States Army’s Implementation Process.  Master’s thesis, Naval Postgraduate School, Monterey, CA.  December 1998.  (Pages 10-12)  Downloaded from http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA358984, 4 March 2012.


[i] Supply Chain Integration OASD (L&MR), Readiness Based Sparing (RBS), downloaded from http://www.acq.osd.mil/log/sci/rbs.htm on 2 March 2012.

[ii] Slyman, George L. and Dennis L. Zimmerman, Improved Inventory Models for the United States Coast Guard Requirements Determination Process, LMI Report CG201RD6, October 1993, downloaded from http://www.dtic.mil/docs/citations/ADA284294 on 8 Mar 2012.
[iii] Forero, Juan, “Aging DC-3s serve as ‘buses of the jungle’ in Colombia,” On-line edition of the Washington Post, 13 March 2012, downloaded from http://www.washingtonpost.com/world/the_americas/aging-dc-3s-serve-as-buses-of-the-jungle-in-colombia/2012/03/07/gIQATlOz6R_print.html.
[iv] U.S. Air Force photo, downloaded from http://www.af.mil/shared/media/photob/photos/020903-o-9999b-048.jpg on 15 March 2012.