Kelvin TOP-SET
- Offers training, consultancy and software for accident and incident investigation. Developers of the TOP-SET methodology and related software. Features free investigator tips and descriptions of commercial offerings.
- http://www.kelvintopset.com/

Seastate Group, Inc.
- Offers investigation, training, and consulting services. Developer of the Fix-It-Once model and Intensive Self Assessment. Features free newsletter and description of commercial offerings.
- http://www.fix-it-once.com/

Tripod Solutions
- Offers training and software. Developers of the Tripod Beta and Delta tools for root cause and risk analysis, and associated sotware. Features papers, brochures, and a non-interactive software demo.
- http://www.tripodsolutions.net

Reliability Center, Inc.
- Offers consulting, training, and software. Developers of the PROACT method for root cause analysis and related software. Features free demo software, articles, presentations, resource links, and discussion forums.
- http://www.reliability.com/

ABS Operational Risk & Performance Consulting Division
- Offers consulting, training, and software. Developers of the SOURCE methodology for root cause analysis, and related Root Cause Leader software. Features free demo software, spreadsheets, forms, and checklists.
- http://www.absconsulting.com/IncidentInvRCA.html

Performance Improvement International. L.L.C.
- Provides consulting services in the areas of incident investigation, business performance improvement, and analysis training.
- http://www.piionline.com/

RELIASS
- Offers software, training, and consulting. Developers of the ASENT, EAGLE, and AIMSS software, provide free seminars in the UK. Features free software offer and description of commercial offerings.
- http://www.reliability-safety-software.com/

humint human intelligence for business
- humints by Haim Dror provide solutions using human intelligence networks humint for business. identifying ill-intentioned activities,redundant costs,losses and opportunities by PBI, CBI, TBI, SBI.
- http://www.humints.com

Apollo Associated Services, Ltd.
- Offers seminars, training, and consulting. Developer of the Apollo process for investigation and analysis of problems and events. Features articles, essays, newsletters, book excerpts, suggested reading list, and descriptions of commercial offerings
- http://apollorca.com/

ThinkReliability.com
- Offers workshops, training, and consulting. Developer of the Cause Mapping process. Features free cause mapping template, online presentations, papers, and descriptions of commercial offerings.
- http://www.thinkreliability.com

System Improvements, Inc.
- Offers training, conferences, software, and reference materials. Developers of the TapRooT system. Site features: newsletters, conference information, and descriptions of commercial offerings.
- http://www.taproot.com

Medical Risk Management Associates, LLC
- Offers software, training, and consulting in healthcare performance improvement. Co-developers of the Root Cause Analyst software package. Provides FAQs, articles, report forms, legal perspectives, and descriptions of commercial offerings.
- http://www.rootcauseanalyst.com

Failsafe Network, Inc.
- Offers consulting, training, and reference materials. Developer of the ROOTS method and the Combing Process. Features online papers and presentations, and descriptions of commercial offerings.
- http://www.failsafe-network.com

Decision Systems, Inc.
- Offers software, training, and consulting. Developers of the REASON method of Root Cause Analysis and associated software. Provides online technical papers, implementation guides and descriptions of commercial offerings.
- http://www.rootcause.com/

Conger & Elsea, Inc.
- Offers training, consulting, and software. Specialists in MORT (Management Oversight and Risk Tree). Site features: newsletters, descriptions of commercial offerings.
- http://www.conger-elsea.com