Steroid therapy may be a non-surgical alternative for the treatment of symptomatic Bertolotti's syndrome.
This report summarizes the presentations, discussions, and recommendations from the Model-Based Enterprise Summit held at the National Institute of Standards and Technology in December of 2012. The purpose of the Summit was to identify challenges, research, implementation issues, and lessons learned in manufacturing and quality assurance where a digital three-dimensional (3D) model serves as the authoritative information source for all activities in a product's lifecycle. The report includes an overview of model-based engineering, technical challenges, summaries of the presentations given at the workshop, and conclusions that emerged from the presentations and discussions.
The Department of Defense and the National Institute of Standards and Technology held a Model Based Enterprise Summit and Technical Data Package (TDP) Workshop December [15][16][17] 2009 in Gaithersburg, MD. The TDP workshop gathered subject matter experts to make recommendations for changes to DoD technical data package specifications. These changes are needed to support DoD transition to total lifecycle management based on digital models rather than 2D drawings. 77 subject matter experts from government and industry identified 46 critical issues affecting adoption of model based technical data packages during the day and a half workshop. Issues were separated into four categories: acquisition, production, sustainment, and policy. The attendees developed 148 proposed actions needed to address the critical issues. Each of four breakout sessions identified solutions and presented them in a final large group setting. The full assembly then prioritized the actions in order to provide a basis for a model based TDP implementation roadmap. but the information becomes reusable throughout the system lifecycle. Improved access to data enables all manner of automation and cost savings. Industry's migration to the model based enterprise should significantly ease the production of TDPs and make acquisition of adequate documentation more viable -but only if DoD TDP specifications are complete, well understood, and developed in partnership with industry. Recommended ActionsProposed actions from the workshop breakout sessions were consolidated and grouped into four distinct areas of need: Actions needed to completely define DoD TDP content requirements and delivery requirements. Actions needed to improve direction, instructions, and policy to better articulate the necessity for acquiring adequate technical data. Improvements in technology needed to fully enable more efficient use of the 3D product description. Actions needed to improve acquisition processes and provide more uniform contract language.Workshop actions were formulated to provide a basis to move forward with planning, support, and execution of TDP-related projects. The central action identified by the workshop was the revision of MIL-STDs and other specifications to support model based technical data packages. Even when prime contractors are willing to provide system technical data, there are significant questions regarding how the data will be transmitted, in what format, and how the government will organize this data in its own data management systems.The top actions in each category are listed below. TDP Definition for MBE Create a comprehensive description of the data required in a TDP. Define requirements for completely annotated models. Revise current MIL-STDs and related documents to consolidate requirements for distinct TDP levels and 3D model based product representations. Acquisition Policies and Directives Mandate participation of all stakeholders and subject matter experts at Data Call and throughout the program, including IP attorneys exp...
Innovations in CAD tools and processes will enable additive manufacturing to continue to mature as a revolutionary process. Ursa Major Technologies utilizes additive manufacturing extensively in its line of rocket propulsion products and uses conventional CAD tools and processes. However, some parts require non-conventional design information. Examples of additive part and process flows will be presented to highlight challenges and opportunities for future CAD innovation. BIOGRAPHYDavid Gregory is the Chief Technology Officer for Ursa Major Technologies, a Colorado-based manufacturer of turnkey propulsion solutions for a wide range of vehicles sized for servicing the micro-and nano-satellite launch community. He oversees technical and engineering processes for Ursa Major's Oxidizer Rich Staged Combustion engine family in a fastpaced R&D environment.
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