| 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. |
| 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. |
| Constraints Management Group: Strives to create holistic solutions that maximize a system's performance by identifying, exploiting and synchronizing around critical leverage points. |
| Focused Performance: Offers constraint based consulting services and presentations. Site contains articles, information and upcoming events related to the Theory of Constraints. |
| Goal Systems International: Disseminates and applies the principles and tools of constraint management to improve organizational systems. |
| 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. |
| Goldratt-TOC: Provides Theory of Constraints related consulting services covering engineering, sales and marketing, strategy, finance and operations. |
| R.B. Vollum & Associates: Consulting and education services covering the Theory of Constraints, continuous manufacturing improvement and synchronous flow management. |
| Realization Technologies: Providers of enterprise software to support multi-project Critical Chain implementations. |
| SKI Consulting: Offers business consulting services based in part on Goldratt's Theory of Constraints. |
| Synchrono: Provides supply chain planning software based on Theory of Constraints and lean manufacturing principles. |
| 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. |
| 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. |
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