Companies

Realization Technologies - Providers of enterprise software to support multi-project Critical Chain implementations.
http://www.realization.com/

The TOC Center Inc. - Global consulting company; the site contains information on theory of constraints including application of TOC, case studies, seminars, and suggested reading.
http://www.tocc.com/

Focused Performance - Offers constraint based consulting services and presentations. Site contains articles, information and upcoming events related to the Theory of Constraints.
http://www.focusedperformance.com/

Chesapeak Consulting Inc. - Applies business tools including Six Sigma, and Theory of Constraints methodologies to project management, synchronous flow manufacturing, sales, marketing, modeling and simulation.
http://www.chesapeak.com/

Avraham Y. Goldratt Institute - Utilizes theory of constraints (TOC) to provide business solutions in the areas of business operations, business policy and strategy, project management, accounting and finance, as well as sales and marketing.
http://www.goldratt.com

SKI Consulting - Offers business consulting services based in part on Goldratt's Theory of Constraints.
http://members.aol.com/consultSKI/

Constraints Management Group - Strives to create holistic solutions that maximize a system's performance by identifying, exploiting and synchronizing around critical leverage points.
http://www.thoughtwarepeople.com/

Goldratt's Marketing Ltd. - Includes information about TOC consultants, books and other training materials for sale, a list of upcoming events, and a history of the Theory of Constraints.
http://TOC-Goldratt.com/

Goal Systems International - Disseminates and applies the principles and tools of constraint management to improve organizational systems.
http://www.goalsys.com/

Goldratt-TOC - Provides Theory of Constraints related consulting services covering engineering, sales and marketing, strategy, finance and operations.
http://www.toc.co.uk/

Synchrono - Provides supply chain planning software based on Theory of Constraints and lean manufacturing principles.
http://www.synchrono.com/

R.B. Vollum & Associates - Consulting and education services covering the Theory of Constraints, continuous manufacturing improvement and synchronous flow management.
http://www.rbvollum.com/

Vector Strategies - Theory of Constraints based solutions provider. TOC solutions available include: critical chain, drum buffer rope, thinking processes, throughput accounting, strategic planning, sales, marketing, distribution and replenishment.
http://www.vectorstrategies.com/