ARRM is an integrated, automated planning tool that models training throughput requirements for live fire training and maneuver events for all Army installations that are managed by the Army’s Sustainable Range Program (SRP). ARRM is used by range and training land managers at all levels, from the individual installation range manager to the range program managers for the various Army Commands and HQDA, to determine the unconstrained doctrinal requirements for ranges and training. It also allows comprehensive "what-if" analysis of the impact of re-stationing actions on live training infrastructure. AR 350-19 identifies ARRM as the tool to be used to derive the doctrinal requirements analysis for ranges and training land, which form the basis for a variety of planning exercises, such as the installation Range Development Plan (RDP), as well as the starting point for budgetary models such as the Range Operations Training Budget (TBUD).

OBJECTIVE
The basic purpose of ARRM is to provide a Web-based capability which allows HQDA G3/5/7, the various Army Commands (ACOMs) and the installation range managers, using consistent data, to:

• Model range throughput requirements using Army Standard force structure documents and approved doctrine such as the STRAC, TC 25-8 and Programs of Instruction (POIs).
• Model maneuver land throughput requirements using Army Standard force structure documents and approved doctrine such as TC 25-1.
• Model maneuver damage done through training using Army Standard force structure documents and the Maneuver Impact Miles (MIMs) model.
• Allow users to create what-if scenarios to analyze the impact of re-stationing actions, institutional training changes etc. on range and training land requirements.
• Model the Range Operations Training Budget (TBUD) based on the range throughput requirements and staffing levels at installations.

BACKGROUND
The Army Training Support Center (ATSC), acting as an Executive Agent for HQDA G3/5/7 commissioned ARRM to be stood up as a model that would allow evaluation of Range and Training Land throughput capabilities and requirements Army-wide. In its early life, ARRM served mainly as a decision support tool for HQDA users, who could use it as a consistent platform to evaluate RTLP requirements across the army using the same set of basic criteria. With the advent of AR 350-19, installations were required to perform doctrinal analysis for their RTLP throughput requirements as the first part of the process that leads to their Range Development Plan. The ARRM Model is called out in the regulation as the tool that helps in doing the doctrinal analysis. ARRM is also the model of record used in calculating the doctrinal maneuver land throughput requirements. These developments has enlarged the ARRM user base and ARRM has currently over 400 users from Army installations, ACOMs and various Army agencies such as the Army Environmental Center who all draw doctrinal requirements from ARRM. In August 2007, ARRM was converted to a Web Application with highly increased transparency on the workings of the model. This transparency, and the auditability it engenders, has been cited by the ARRM user community as the prime reason for the popularity of the model. In March 2008, ARRM also started modeling the Range Operations Training Budget (TBUD) for Army installations, and has earned high praise for the way it enabled the first automated TBUD submissions, review and approval cycle in the spring of 2008.