Acq Notes

A simulator is a device, computer program, or system that performs simulation. A simulation is a method for implementing a model (see model types) over time. There are three (3) types of commonly uses simulations: [1] Live: Simulation involving real people operating real systems Involve individuals or groups May use actual equipment Should provide a

Verification, Validation, and Accreditation (VV&A) are three interrelated but distinct processes that gather and evaluate evidence to determine whether a model or simulation should be used in a given situation and establishing its credibility. The decision to use the simulation will depend on the simulation’s capabilities and correctness, the accuracy of its results, and its

  Simulation Based Engineering Science (SBES) is a new discipline of engineering and applied science in which modern computational methods and devices and collateral technologies can be combined to resolve fundamental issues far outside the scope of traditional scientific and engineering methods; like prototyping. SBES in an interdisciplinary field, arising from the intersection of more

The Simulation, Test and Evaluation Process (STEP) has been proposed in DoD guidance of the recent past and is still a valid concept. In STEP, simulation and test are integrated, each depending on the other to be effective and efficient. Simulations provide predictions of the system’s performance and effectiveness, while tests are part of a

  Simulation-Based Acquisition (SBA) is the robust and interactive use of Modeling & Simulation (M&S) throughout the product life cycle. The Program Manager (PM) should employ SBA and M&S during system design, test and evaluation, and modification and upgrade. The PM should collaborate with operational users and consider industry inputs during SBA/M&S program planning. Planning

A Prototype is a physical or virtual model used to evaluate the technical or manufacturing feasibility or military utility of a particular technology or process, concept, end item, or system. Prototyping is used in an acquisition program as a tool for: Risk Reduction Technology maturation Identifying and resolving integration risks Controlling manufacturing and sustainability risks

A Systems Engineering approach to synthetic environments and Modeling & Simulation (M&S) are themselves systems intended to accomplish particular objectives. It follows that M&S Planning represents the initial steps of a disciplined system engineering approach, the elements of which are: [1] M&S Requirements Analysis: Defines the program objectives M&S may be able to satisfy. The contexts

  Below is a list of a few common words that may have special meaning when applied to models. [1] Accuracy: The closeness of a measured or modeled/computed value to its “true” value. The “true” value is the value it would have if we had perfect information. We will talk later about various ways to

Modeling and Simulation (M&S) Planning is a function of the Systems Engineering department focused on Test and Evaluation. Deliberate and disciplined planning, accomplished early and iteratively throughout the program’s lifecycle, is essential for effective use of M&S. A M&S plan should be developed that is integrated into the Acquisition Strategy, Systems Engineering Plan (SEP), Test

Effective acquisition requires collaboration among multiple Stakeholders. Modeling & Simulation (M&S) tools combined with an information-sharing infrastructure (i.e., integrated data environment – IDE) into a distributed collaborative environment can enable cost-effective development and sustainment of systems and systems of systems. [1] M&S should share the common information base with the rest of Systems Engineering. The

Human-in-the-Loop (HITL) Modeling & Simulation (M&S) is a model type that requires human interaction during runtime. It employs one or more human operators in direct control of the simulation/simulator or in some key support function. Human-centered M&S is distinguished from science and process-based simulations where human intervention and modeling does not occur. [1] Human-in-the-Loop lends

A model is a representation of the construction and working of some system of interest. A model is similar to but simpler than the system it represents. A simulation (see simulator types) is a method for implementing a model. There are four (4) common types of models that are used. These are: [1,2] Physical: A

A High-Level Architecture (HLA) is a family of related standards that together describe a unified approach and common architecture to constructing interoperable simulation systems. It contains major functional elements, interfaces, and design rules, pertaining to all DoD simulation applications, and providing a common framework within which specific system architectures can be defined. High-Level Architecture (HLA)