[[General Electric]]'s MAPS (Multi-Area Production Simulation) is a production simulation model used by various [[Regional transmission organization (North America)|Regional Transmission Organizations]] and [[Regional transmission organization (North America)#Independent System Operators (ISOs)|Independent System Operators]] in the United States to plan for the economic impact of proposed electric transmission and generation facilities in FERC-regulated electric wholesale markets. Portions of the model may also be used for the commitment and dispatch phase (updated on 5 minute intervals) in operation of wholesale electric markets for RTO and ISO regions. [[ABB]]'s PROMOD is a similar software package. These ISO and RTO regions also utilize a GE software package called MARS (Multi-Area Reliability Simulation) to ensure the power system meets reliability criteria (a loss-of-load-expectation (LOLE) of no greater than 0.1 days per year). Further, a GE software package called PSLF (Positive Sequence Load Flow), a [[Siemens]] software package called PSSE (Power System Simulation for Engineering) and [[Electrical Transient Analyzer Program|ETAP]] (Electrical Transient Analyzer ProgramETAP)]] by Operation Technology Inc.<ref>[https://etap.com Operation Technology Inc.]</ref> analyzes load flow on the power system for short-circuits and stability during preliminary planning studies by RTOs and ISOs.<ref>{{cite web|title=ABB PROMOD Market Simulation|url=https://new.abb.com/enterprise-software/energy-portfolio-management/market-analysis/promod|work=new.abb.com|accessdate=November 26, 2018}}</ref><ref>{{cite web|title=GE Multi-Area Production Simulation|url=https://www.geenergyconsulting.com/practice-area/software-products/maps|work=www.geenergyconsulting.com|accessdate=November 26, 2018}}</ref><ref>{{cite web|title=GE Multi-Area Reliability Simulation|url=https://www.geenergyconsulting.com/practice-area/software-products/mars|work=www.geenergyconsulting.com|accessdate=November 26, 2018}}</ref><ref>{{cite web|title=GE Power System Load Flow Simulation|url=https://www.geenergyconsulting.com/practice-area/software-products/pslf|work=www.geenergyconsulting.com|accessdate=November 26, 2018}}</ref><ref>{{cite web|title=NYSRC 2018 IRM Study Report|url=http://www.nysrc.org/pdf/Reports/2018%20IRM%20Study%20Report%20Final%2012-8-17[2098].pdf|p=2|work=www.nysrc.org|date=December 8, 2017|accessdate=November 26, 2018}}{{Dead link|date=May 2020 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{cite web|title=NYISO Notice to Stakeholders of Request for MAPS data|url=https://www.nyiso.com/public/webdocs/markets_operations/documents/Legal_and_Regulatory/Notices/MP_Notices/Notice%20to%20Generators%20re%20GE%20MAPS%20database%20input%20files%20for%20CARIS%202%20-%209-9-14.pdf|work=www.nyiso.com|date=August 2000|accessdate=November 26, 2018}}</ref><ref>{{cite web|title=Siemens PSSE|url=https://www.siemens.com/global/en/home/products/energy/services/transmission-distribution-smart-grid/consulting-and-planning/pss-software/pss-e.html|work=www.siemens.com|accessdate=November 26, 2018}}</ref><ref>{{cite web|title=New York State Resource Planning Analysis (NYSPSC)|url=https://www.nyiso.com/public/webdocs/markets_operations/committees/mc/meeting_materials/2015-12-17/Agenda%2004_NYSDPS%20SRP%20Presentation_revised.pdf|work=www.nyiso.com|date=December 17, 2015|accessdate=November 26, 2018}}</ref>
