TOCICO

Philip Marris examines why V-plants and process industries need a management approach that reflects the structure of their flow. He begins with TOC’s VAT model, contrasting V-, A-, and T-type manufacturing. V-plants are typically continuous or semi-continuous process environments in which a small number of raw materials diverge through common process steps into a large range of finished goods. Examples include steel, chemicals, paper, textiles, food, pharmaceuticals, and semiconductors. These environments often have expensive fixed assets, limited flexibility, large batches, and operating histories built around volume and unit-cost thinking; Marris argues that conventional MRP logic and classic Kanban pull can be poor fits. The session applies the Five Focusing Steps to three industrial cases. In a 2,900-person steel factory, the assumed bottleneck was a large rolling mill, but the real constraint was six heat-treatment furnaces. In another steel plant, workload had fallen to about 50% of capacity, yet a constraint remained hidden across more than 30 queue locations: 16 people performing manual testing. A chemical-factory example shows a self-inflicted constraint, where large campaigns and OEE-driven overproduction filled the finished-goods warehouse and repeatedly blocked production lines. Marris then develops the operational response. Work-in-process profiles can reveal blocked flow; Drum-Buffer-Rope protects the bottleneck and shipment performance; inventory positioning supports Make-to-Stock, Make-to-Order, and Finish-to-Order choices; and postponed differentiation can absorb SKU-level demand variability. For changeovers, he recommends simple sequencing such as product wheels, adapted “Process SMED,” and stronger process mastery. He also shows how transition products can turn changeover output into saleable throughput. Capital projects are another leverage point because V-plants are capital intensive. Marris recommends Critical Chain Project Management for upgrades, line moves, and installations and states that project durations can often be reduced by 20% to 80%. The closing argument is that TOC is especially pertinent to V-plants because it integrates constraint identification, flow protection, supply-chain logic, changeover improvement, and project execution around the performance of the whole system.