a. agreement. operational availability over extended time periods even for low-reliability systems, but it will also result in significant costs, the result of replacing most parts prematurely and underutilizing their service life. “Downtime” is a principal element of the Operational Availability (Ao) formula True or False 2.) Linked to system level required sustainment metrics objectives. Operational availability is used to evaluate the following performance characteristic. Operational Availability indicates the percentage of time that a system or group of systems within a unit are operationally capable of performing an assigned mission and can be expressed as (uptime/(uptime + downtime)). (1) For MOT&E, the lead developing/acquisition Service’s OTA will be the lead OTA . TASK NUMBER 5f. It includes all time where the system is not at the disposal of the Force Provider to initiate missions. Materiel Reliability is the cornerstone that insures both Am and Ao requirements can be met. Does the analysis package support the downtime? The Maintenance Division of the Logistics Directorate of the Joint Staff has published a guide to the Sustainment KPP that outlines criteria that the Joint Staff will use to determine if a program has done an adequate job of implementing the requirements for the Sustainment KPP (Am). (A graphic representation (timeline) of the life-cycle profile is an effective way to present the data.). f. Materiel Availability has been defined in OSD and JCS documentation in a way that makes it clear how it differs from Ao; i.e., it must apply to the entire fielded inventory of systems, over the entire life-cycle of the system and incorporate all categories of downtime. Simulation modeling also allows the program to test various alternative support strategies and, once developed, can continue to be updated and used throughout the system life cycle to provide estimates of Am as fielding plans, operational environments and deployment requirements change. It focuses on terms with generic DoD application but also … Instantaneous (or Point) Availability 2. Annex G defines basic operational suitability terminology and definitions. Please note that you should expect to receive a response from our team, regarding your inquiry, within 2 business days. For example, there DoD Guide for Achieving Reliability, Availability, and Maintainability (8/3/2005) The primary objective of DoD acquisition is to acquire quality products that satisfy user needs with measurable improvements to mission capability and operational support in a timely manner, and at a fair and reasonable price. The Materiel Availability is not interchangeable with the Operational Availability metric that is a KPP requirement for many DoD systems. The proponent ... report, critical operational issues and criteria, and contract specifi-cations. The best way to view the relationship between Am and Ao is to see Am as a function of Ao, together with many other variables. CONTRACT NUMBER 5b. Additionally, they should be: Please note that you should expect to receive a response from our team, regarding your inquiry, within 2 business days. [Identify the two components of "Availability" as they apply to the KPP] [Remediation Indirectly. PROGRAM ELEMENT NUMBER 6. The Sustainment KPP has two Key System Attributes and a Metric that provide an integrated structure that balances Sustainment with capability and … A good way to look at the relationship between Am and Ao is to view Am as a function, (together with many other variables), of Ao. Are sources of data identified? Is there evidence of a comprehensive analysis of the system and its planned use, including the planned operating environment, operating tempo, reliability alternatives, maintenance approaches, and supply chain solutions leading to the determination of the KPP value? The Materiel Availability KPP must apply to the entire fielded inventory of systems, the entire life cycle of the system and incorporate all categories of downtime such as depot-level and … To calculate system availability for a certain period of time, divide an asset’s total amount of uptime by the sum of total uptime and total downtime. 4 Operational Availability Handbook OPAH Reliability Analysis Center (RAC) • 201 Mill Street, Rome, NY 13440-6916 • 1-888-RAC-USER. Operational Availability is defined as Uptime divided by Uptime plus Downtime. In other words, reliability of a system … Lesson: Measures of Combat Capabilities Enhanced by RAM Page 9 of 14 Measures of Combat Capabilities Enhanced by RAM Image Description: Operational Availability formula, which is “A” sub “o” is equal to MTBM divided by the sum of MTBM and MDT. Examining these components of Mean Downtime, it should be noted that both Mpt and Mct are essentially characteristics of system design. Mean Downtime is the Availability … For this reason, the Mean Downtime metric is seldom part of a performance-based life cycle product support—or PBL—arrangement, since it would be highly unusual for one entity to control all aspects of Mean Downtime. In other words, the design of the system will determine how much preventive maintenance is required and how long it will take. The ASOAR model will cease computation when the difference between the product of the operational availabilities of all end itan configurations and the adjusted Ao goal are within a tolerance of 0.0001. CLL 001 Life Cycle Management & Sustainment Metrics Exam 1.) During earlier phases, Am goals and the assessment of a given system's ability to meet those goals must be estimated through analysis. With the establishment of the Sustainment KPP and KSAs, the LCL will have to take the time … This does not mean, however, that these two metrics are unrelated. Ultimately, availability is uptime divided by total time. As with most other high-level sustainment metrics, Mean Downtime is generally broken down into lower order metrics. 10 Rm is far more important in determining the level of availability that is achievable than any other component of logistics system. How does the downtime value compare with that experienced by analogous systems? AUTHOR(S) 5d. This can be expressed mathematically as (the number of operational end items divided by the total population). Background. Is it traceable to the ICD, CDD, other JCIDS analysis, or agreement with the warfighting community? Is downtime caused by failure addressed?  Reliability is critical because it contributes to a system’s war fighting effectiveness as well as its …Continue Reading→ Operational Availability = Time equipment actually able to run / Time when equipment is needed to run If the equipment was down 2 hours out of a 20 hour period when the equipment was needed (available only 18 hours), the Operational Availability would be 18 hours / 20 hours = 9/10 = 0.9 = 90%. In addition to the projected supply chain approach with its resultant logistics footprint, the impact of surge/deployment acceleration requirements should be determined for this and the Materiel Availability metric. It addresses reliability, availability, and maintainability (RAM) as essential elements of mission capability. Definitions of the Availability KPP and supporting Reliability, Maintainability and Ownership Cost KSAs are provided in that instruction. Specific time categories (and terminology) included in uptime and total time for computing "operational" availability may be organizational dependent. The Acquisition Program Baseline 1. Address opportunities in the different phases of a system lifecycle to increase reliability. The Defense Acquisition Guidebook, Chapter 18.104.22.168 defines mean downtime as the average time an end item is unavailable to perform its assigned mission after it experiences unscheduled or scheduled maintenance actions. If Reliability constitutes the "Uptime" part of the formula, Mean Downtime constitutes the "Downtime." sibilities for the reliability, availability, and maintainability of its materiel. While the risk of failure is reduced because the platform The OSD definition of Materiel Availability includes two different formulas for expressing Am. λ λ. The JROC identified certain KPPs and KKSAs as mandatory True or False 3.) MLDT is determined by such factors as adequacy and positioning of spare parts, transportation, operational issues—and many more. Methodology for Estimation of Operational Availability as Applied to Military Systems 5a. The Sustainment KPP, Availability, is derived from the operational capability requirements of the system, assumptions for use, and the planned Sustainment strategy. Relationship between lead OTA and participating OTAs. Since Am can be viewed as a function of Ao, programs need to carefully assess how they establish goals for Am and how these goals relate to program requirements for Ao. Given that the definition of Materiel Availability mandates that it consider the entire fielded population of systems, the entire system life cycle, and all categories of downtime it is not possible to obtain a comprehensive estimate of Am from system testing during the Engineering and Manufacturing Development or Production and Deployment phases of system development. One of the key systen level outputs of the ASOAR model is … operational support in a timely manner, and at a fair and reasonable price.1 This guide supports that objective. The Materiel Availability KPP must apply to the entire fielded inventory of systems, the entire life cycle of the system and incorporate all categories of downtime such as depot-level and scheduled maintenance. The best way to assess both Am and Ao is through comprehensive modeling and simulation. Determining the optimum value for Operational Availability … Based on the evaluation results, the LCL recommends to the IPT adjustments, such as promoting an SRU to an LRU, that benefit Operational Availability and/or Cost. Operational Availability Operational Availability (Ao) is the Mean Time Between Failures (MTBF) divided by the sum of Mean Time Between Failures (MTBF), Mean Time to Repair (MTTR) and Mean Logistics Delay Time (MLDT). Operational Availability is defined as Uptime divided by Uptime plus Downtime. Even complex, high density systems can be assessed with simulation models and these models can often be developed in a reasonable period of time, even with limited resources. See this blog post for a more comprehensive description of various factors that may, or may not, be included in … System testing, both Developmental and Operational Testing, can be used to obtain data on some of the variables that make up Am; e.g. The classification of availability is somewhat flexible and is largely based on the types of downtimes used in the computation and on the relationship with time (i.e., the span of time to which the availability refers). Common Elements of Multi-Service Operational Test (MOT). The JCIDS Manual further identifies "Reliability" as a mandatory Key System Attribute (KSA). This paper aims at defining the different types of availabilities based on a common approach developed by Operational Availability KPP indicates the percentage of time that a system or group of systems within a unit are operationally capable of performing an assigned mission. The August 2018 JCIDS Manual, establishes a mandate for programs to develop a Sustainment KPP and for all programs of JROC interest to develop a Sustainment KPP and supporting KSAs. The DAU Glossary, also referred to as the Glossary of Defense Acquisition Acronyms and Terms, reflects most acronyms, abbreviations, and terms commonly used in the systems acquisition process within the Department of Defense (DoD) and defense industries. It ignores Mean Logistics Delay Time (MLDT) and may be calculated as Mean Time Between Maintenance (MTBM) divided by the sum of MTBM and Mean Maintenance Time (MMT), that is, AA = MTBM/ … Are the values used for failure rates supported by the analysis? Provide definitions and equations for calculating A o and identifying sources … MBTF measures the … It is an integral element of the Operational Availability formula. Objectives: Explain how a product's R&M characteristics will affect the measures of logistics support and ultimately the cost of support. - Operational Availability. A number of different methods can be used to perform analysis of Materiel Availability. What is the overall sustainment CONOPS? A poor Ao will have a negative impact on Am that will be difficult to overcome regardless of strategies for operational readiness floats and national maintenance. During this correct operation, no repair is required or performed, and the system adequately follows the defined performance specifications. MTBF and MTTR. Operational Availability is one of the two components of the Availability Key Performance Parameter (KPP) defined in Appendix E, Enclosure B of the Joint Capabilities Integration and Development System (JCIDS) Manual. It supports the Reliability KSA, which in turn supports the Availability KPP. Average Uptime Availability (or Mean Availability) 3. Simply using their Ao requirement as their Sustainment KPP Am objective might result in an Am goal that is impossible to achieve for some programs. Reliability is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. Availability, operational (Ao) The probability that an item will operate satisfactorily at a given point in time when used in an actual or realistic operating and support environment. operational environment. Does the program account for the total population of end items being acquired for operational use? Operating Time + Standby Time Operating Time + Standby Time + TPM + TCM + MLDT TPM = Total Preventive Maintenance Time TCM = Total Corrective Maintenance Time MLDT = … The key elements that must be incorporated in any assessment of Am are: any measure of Am must include the total population of systems (end items) to be fielded; any measure of Am must consider the total life cycle timeframe of the system (end item); and any measure of Am must include all major categories of downtime, both planned and unplanned. The Materiel Availability is not interchangeable with the Operational Availability metric that is a KPP requirement for many DoD systems. It includes logistics time, ready time, and waiting or administrative downtime, and both preventive and corrective maintenance downtime. being used? Since Am includes the entire system inventory and life-cycle and all categories of downtime it will usually be difficult for a system to achieve an Am goal that is equal to or higher than an Am requirement defined for a smaller group of systems, shorter time period and limited categories of downtime. Is planned downtime (all causes) identified and included? It doesn t. It has no bearing on the Availability KPP. Stochastic simulation modeling helps overcome some of the problems inherent in making assumptions about the nature of the variables that contribute to Am. This policy ... (Acquisition, Logistics and Technology). 2. An adequate Ao is one of the essential building blocks to achieving a high level of availability of total fielded inventory throughout the life cycle of a fielded system. Only after a system has completed fielding and is in the Operations and Support phase of its life cycle can data be collected to produce estimates of actual Am. Summary. Are specific definitions provided for failures, mission-critical systems, criteria for counting assets as "up" or "down"? As a result, there are a number of different classifications of availability, including: 1. The LCL evaluates the impact on Operational Availability and Cost of implementing original policy instead of least-cost recommendations. Operational Availability requirements always apply to a limited number of systems fielded to a particular echelon of operational units and frequently incorporate only unscheduled maintenance downtime due to reliability failures. Does the metric clearly define and account for the intended service life, from initial placement into service through the planned removal from service? In understanding of the Sustainment Key Performance Parameter (KPP) for Materiel Availability (Am), the Key System Attribute (KSA) for Materiel Reliability (Rm) and how both of these relate to requirements for Operational Availability (Ao) it is important for program managers to focus on reliable system designs, effective life cycle support strategies, and adequate testing of these system parameters and attributes. View Mod 6pre.pdf from DAU ACQ 202 at Franklin University. Have surge/deployment acceleration requirements been identified? As a KPP, an Acquisition Program Manager must calculate A o and demonstrate that the In this case, it is most often expressed as Mean Preventive Maintenance Time (Mpt or Mpt) plus Mean Corrective Maintenance Time (Mct or Mct ) plus Mean Logistics Delay Time (MLDT). DAU Contains 9 Questions Page 1 of 2 (Attempt=1/3) Module 6 Exam 1) Decreased operational availability (Ao), increased costs, and bloated Step 1: Mean Time Between Failure (MTBF) MTBF is a measure of of reliability. Are sources of data cited? Since testing alone cannot insure that these system parameters, attributes and requirements will be met by any given system design and support strategy, it is important for program managers to understand how system analysis, modeling and simulation can be used to help insure the goals of these parameters, attributes and requirements are satisfied. Determining the optimum value for Operational Availability requires a comprehensive analysis of the system and its planned use as identified While not a formal KPP or KSA, its importance in determining Operational Availability is paramount. Operational Availability (AO): Percentage of time that a system or group of systems within a unit are operationally capable of performing an assigned mission and can be expressed as uptime/ (uptime + downtime). Achieve greater availability for a system through effective R&M processes. The fact that the same formula (Uptime / Uptime Downtime) is included in the definitions for both Materiel Availability and Operational Availability should not be mistaken for an indication that the two metrics are identical. Relationship of Operational Availability (Ao) to Materiel Availability (Am). b. WORK UNIT NUMBER 7. Aircraft Availability is a key indicator to monitor aircraft performance, as a complement to Operational Reliability, and can be employed to optimize the profitability of an airline. It focuses on what can be done to achieve satisfactory levels of RAM and how to assess RAM. Availability Measures • Operational Availability (A o) can be described by the following equation: A o=uptime/total time. GRANT NUMBER 5c. Designing the product to be reliable and maintainable is the best way to minimize the cost to support a product and maximize the availability of that product. For more complex systems with higher densities simulation modeling may provide a better analytical method of estimating Am. These are the distinguishing features of the Materiel Availability metric that differentiate it from the more familiar Operational Availability metric (uptime/uptime downtime). The first is shown below and represents a point (instantaneous) estimate for Materiel Availability as a measure expressed as a percentage of systems (end items). Availability = uptime ÷ (uptime + downtime) Here’s an example of the system availability formula in action: One of your top production assets ran for 100 hours … The term "baseline" is defined in the Defense Acquisition University Glossary as a "…quantity or quality used as a starting point for subsequent efforts and progress measurement…” Within that definition there are several types of baselines. On the other hand, MLDT is a function of process, a process that is the result of product support planning. Reliability follows an exponential failure law, which means that it reduces as the time duration considered for reliability calculations elapses. What models are being used to establish and track the KPP. R(t) = e-λ. Achieved Availability: A system with respect to operating time and both corrective and preventive maintenance. As with many other metrics, particularly those used in a performance-based product support—or PBL—environment, care must be taken to appropriately define the parameters of the lower-order Mean Downtime metrics and achieve a common understanding of that definition among the various stakeholders. Provide policy regarding Operational Availability (A o) as a primary measure for readiness of naval systems, subsystems, and equipment. As the Product Support Manager Guidebook says: "Note that these metrics must be mathematically and qualitatively described before they are useful. Where: MTBM (Mean Time Between Maintenance) is a reliability … AO can also be expressed in terms of logistics parameters. Is it consistent with other CONOPS, design reference missions, scenarios, etc. The principal importance of Mean Downtime (MDT) as a life cycle sustainment metric lies in its relationship to the Operational Availability (AO) formula. – The KPP and supporting KSAs ensure early sustainment planning, enabling the requirements and acquisition communities to provide a capability solution with optimal availability and reliability to the warfighter at an affordable life cycle cost. This guide supports that … For low density systems with simple supply and maintenance concepts, closed-form analytical solutions could be used to develop estimates of Am. The Defense Acquisition Guidebook, Chapter 22.214.171.124 defines mean downtime as the average time an end item is unavailable to perform its assigned mission after it experiences unscheduled or scheduled maintenance actions. Inhe… Materiel Availability (Am) â Definitions and Methods of Assessing. Materiel Availability is a measure of the percentage of the total inventory of a system operationally capable (ready for tasking) of performing an assigned mission at a given time, based on materiel condition. If In some cases, however, systems that are very low density may be able to establish Am goals that are equal to Ao requirements. Operational Availability is a Key Performance Parameter (KPP) that the weapon system is suitable for production and sustainable through its life cycle. Reliability is the probability that a system performs correctly during a specific time duration. operational availability of the outputted results. PROJECT NUMBER 5e. a. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) U.S. Army … Similarly, system design will determine how much corrective maintenance is required (determined by the inherent Reliability of the system) and how long it will take. 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