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22-652: Since 2010, General Electric has spent more than $ 300 million to develop and test T901-specific technologies. In 2016, the Army awarded GE Aviation a $ 102-million, 24-month contract for the T901 preliminary design review for which a team of more than 100 engineers was assembled. The GE-funded prototype six month testing was completed in October 2017, meeting or exceeding the ITEP performance and growth requirements. On 1 February 2019,

44-461: A CDR: A PRR is held for Flight System and Ground Support projects developing or acquiring multiple or similar systems greater than three or as determined by the project. The PRR determines the readiness of the system developers to efficiently produce the required number of systems. It ensures that the production plans; fabrication, assembly, and integration enabling products; and personnel are in place and ready to begin production. A TRR ensures that

66-443: A FRR: Functional requirements In software engineering and systems engineering , a functional requirement defines a function of a system or its component, where a function is described as a summary (or specification or statement) of behavior between inputs and outputs. Functional requirements may involve calculations, technical details, data manipulation and processing, and other specific functionality that define what

88-427: A PDR: The CDR demonstrates that the maturity of the design is appropriate to support proceeding with full-scale fabrication, assembly, integration, and test. CDR determines that the technical effort is on track to complete the flight and ground system development and mission operations, meeting mission performance requirements within the identified cost and schedule constraints. The following are typical objectives of

110-521: A half-day powerpoint with content determined by the Project Manager with attendance limited to high-level (non-technical) stakeholders with no output other than the PM being able to claim "SRR done". Some of the reviews that may be done on an effort include: The MCR affirms the mission need and examines the proposed mission's objectives and the concept for meeting those objectives. The SRR examines

132-422: A request; systems engineers attempt to discuss, observe, and understand the aspects of the requirement; use cases, entity relationship diagrams, and other models are built to validate the requirement; and, if documented and approved, the requirement is implemented/incorporated. Each use case illustrates behavioral scenarios through one or more functional requirements. Often, though, an analyst will begin by eliciting

154-423: A set of use cases, from which the analyst can derive the functional requirements that must be implemented to allow a user to perform each use case. A typical functional requirement will contain a unique name and number, a brief summary, and a rationale. This information is used to help the reader understand why the requirement is needed, and to track the requirement through the development of the system. The crux of

176-451: A system is supposed to accomplish. Behavioral requirements describe all the cases where the system uses the functional requirements, these are captured in use cases . Functional requirements are supported by non-functional requirements (also known as "quality requirements"), which impose constraints on the design or implementation (such as performance requirements, security, or reliability). Generally, functional requirements are expressed in

198-583: A system. This should be contrasted with non-functional requirements, which specify overall characteristics such as cost and reliability . Functional requirements drive the application architecture of a system, while non-functional requirements drive the technical architecture of a system. In some cases a requirements analyst generates use cases after gathering and validating a set of functional requirements. The hierarchy of functional requirements collection and change, broadly speaking, is: user/ stakeholder request → analyze → use case → incorporate. Stakeholders make

220-439: Is described as "documented, comprehensive, systematic examination of the design to evaluate the adequacy of the design requirements, to evaluate the capability of the design to meet these requirements, and to identify problems". The FDA also specifies that a design review should include an independent reviewer . The list of reviews done by an effort and the content, nature, process, and objectives any review uses vary enormously by

242-841: The United States military integrated acquisition lifecycle the Technical section has multiple acquisition "Technical Reviews". Technical reviews and audits assist the acquisition and the number and types are tailored to the acquisition. Overall guidance flows from the Defense Acquisition Guidebook chapter 4, with local details further defined by the review organizations. Typical topics examined include adequacy of program/contract metrics, proper staffing, risks, budget, and schedule. In NASA 's engineering design life cycle , design reviews are held for technical and programmatic accountability and to authorize

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264-464: The functional requirements and performance requirements defined for the system and the preliminary program or project plan and ensures that the requirements and the selected concept will satisfy the mission. The MDR examines the proposed requirements, the mission architecture, and the flow down to all functional elements of the mission to ensure that the overall concept is complete, feasible, and consistent with available resources. The SDR examines

286-521: The test article (hardware/software), test facility, support personnel, and test procedures are ready for testing and data acquisition, reduction, and control. This is not a prerequisite for Key Decision Point entry. The SAR verifies the completeness of the specific end products in relation to their expected maturity level and assesses compliance to stakeholder expectations. The SAR examines the system, its end products and documentation, and test data and analyses that support verification. It also ensures that

308-989: The US Army in the fall of 2023. Another engine production delay caused the initial flight of a FARA prototype to be rescheduled for early 2024. GE has maintained the T700 single spool architecture for modularity and reliability with additive manufacturing and ceramic matrix composites (CMCs) from the CFM LEAP , GE9X or GE ATP . Additive manufactured components lower weight by minimizing attaching features in assemblies and allows more advanced aerodynamic shapes for better engine performance, reliability and durability. More durable and higher temperature CMCs replace metal alloys, needing less cooling and improving engine efficiency. Data from 2019 ARPA-E INTEGRATE annual meeting (estimates) Related development Comparable engines Related lists Preliminary design review In

330-513: The US Army selected the GE T901 as the winner of the ITEP program. Engineering completion and manufacturing development are contracted for $ 517 million, for August 2024 before low-rate production. On 22 March 2022, the first turboshaft began bench tests at GE’s Lynn, Massachusetts facility. It finished on 28 June 2022 after over 100 hours of testing. The first engine was scheduled to be delivered to

352-399: The form "system must do <requirement>," while non-functional requirements take the form "system shall be <requirement>." The plan for implementing functional requirements is detailed in the system design, whereas non-functional requirements are detailed in the system architecture . As defined in requirements engineering , functional requirements specify particular results of

374-434: The organization involved and the particular situation of the effort. For example, even within the U.S. Department of Defense , System Requirements Review cases include, for example, (1) a 5-day perusal of each individual requirement, or (2) a 2-day discussion of development plan documents allowed only after the system requirements have been approved and the development documents reviewed with formal action items required, or (3)

396-501: The proposed system architecture and design and the flow down to all functional elements of the system. The PDR demonstrates that the preliminary design meets all system requirements with acceptable risk and within the cost and schedule constraints and establishes the basis for proceeding with detailed design. It will show that the correct design options have been selected, interfaces have been identified, and verification methods have been described. The following are typical objectives of

418-521: The release of funding to a project. A design review provides an in-depth assessment by an independent team of discipline experts and managers that the design (or concept) is realistic and attainable from a programmatic and technical sense. Design review is also required of medical device developers as part of a system of design controls described in the US Food and Drug Administration 's governing regulations in 21CFR820. In 21CFR820.3(h), design review

440-411: The requirement is the description of the required behavior, which must be clear and readable. The described behavior may come from organizational or business rules, or it may be discovered through elicitation sessions with users, stakeholders, and other experts within the organization. Many requirements may be uncovered during the use case development. When this happens, the requirements analyst may create

462-410: The system has sufficient technical maturity to authorize its shipment to the designated operational facility or launch site. The ORR examines the actual system characteristics and the procedures used in the system or end product's operation and ensures that all system and support (flight and ground) hardware, software, personnel, procedures, and user documentation accurately reflect the deployed state of

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484-400: The system. The following are typical objectives of an ORR: The FRR examines tests, demonstrations, analyses, and audits that determine the system's readiness for a safe and successful flight or launch and for subsequent flight operations. It also ensures that all flight and ground hardware, software, personnel, and procedures are operationally ready. The following are typical objectives of

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