ARMY SIMULATIONS JUST DON'T CUT THE MUSTARD


FIGURE 1


monolithic simulations that simply provide all the required simulation functional- ity or representation, and are slower and more expensive to modify. Tis approach enables executing each distributed simu- lation use case with fewer resources and data streams (for more details see, “A Necessary Paradigm Change to Enable Composable Cloud-based MS Services,” by Andreas Tolk and Saurabh Mittal in the Proceedings of the 2014 Winter Simu- lation Conference).


MSAAS FRAMEWORK


Service-oriented simulations are designed to be modular, where individual functions or domains that are modeled in the simulation are built as individual parts that can be changed or mixed in different ways for the particular use case. (Graphic by the authors and USAASC)


necessary to develop and modify simula- tion capabilities more rapidly and with much less post-development integration re-engineering.


EMERGENCE OF M&S AS A SERVICE In 2018, the NATO Science and Tech- nology Organization’s Modelling and Simulation Group introduced the M&S as a service (MSAAS) concept to enable more composable simulation environ- ments that can be deployed and executed on-demand (NATO MSG-136 Report – MSAAS Concept and Reference Archi- tecture Evaluation Report) (see Figure 1). Service oriented simulation is modularly designed, where functions or domains


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modeled in the simulation are built as individual parts that can be changed or mixed in different ways for the particu- lar use case.


Te MSAAS paradigm supports agile, rapid, tailor-made simulation solutions from a collection of pre-built and validated models and tools into a unified cloud- based simulation environment whenever the need arises.


MSAAS is intended to promote discov- ery, reusability and composability of M&S services by one key aspect, the use of modularized simulations. Tese tools can be easily tailored and composed for a specific use case, rather than relying on


MSAAS offers an opportunity to better leverage new technologies and tools, plus create inherently interoperable capabilities faster through cooperative and coordi- nated research and development efforts. Open-source software development, which avoids the limitations of proprietary solu- tions, enables crowd-sourcing, which is more effective for innovations. Tis opens participation by smaller compa- nies with new ideas. Open-source allows for many more experts and more coopera- tion for more frequent innovations. A good example is the development of the Linux operating system.


MIGRATION FOR ARMY MODERNIZATION To achieve the required agility and cost limitations, migration from the current monolithic simulation paradigm to one of M&S services that support rapid simu- lation development is critical for Army modernization to keep pace. However, Army modernization cannot wait 10 to 15 years—the typical timeframe for building a new simulation environment—while the new MSAAS ecosystem is created from scratch.


Therefore, the proposed alternative approach is to integrate cloud-enabled services with existing simulations through a web-enabled interface to provide new modeling capabilities as they develop (see


Army AL&T Magazine Summer 2022


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