Lean Manufacturing |
QRM |
| Best applied with stable demand, higher volume products. |
Can be applied to one-of-a-kind custom products too. |
| Focuses on factory floor and suppliers. |
Expands to the whole organization. |
| Synonymous with kanban. If used with QRM, the kanban method requires significant modification. |
If JIT has been implemented it paves the way for QRM. |
| Systematic elimination of waste leads to continuous improvement. |
Relentless reduction of lead time results in continuous improvement and elimination of waste. |
| Create "flow" by designing production lines so orders can proceed continuously without backflow or stoppages. One-piece flow is the goal. |
Create cells based on families of products with similar operations. One-piece flow is not necessary; small batches are acceptable based on the customized nature of products. |
| Support flow using takt time and level scheduling. Use detailed task analysis and work standardization to achieve balanced takt times throughout the production facility. |
Utilize organizational flexibility and understanding of system dynamics to meet the demand for widely differing products. Different combinations of cells can be used. |
| Suppliers achieve flow requirements via pull signals and flex fences. |
Suppliers change their operations and redefine their interactions with the customer. |
| Pull signals material replenishment: "sell one; buy one". Inventory is critical at each point in the supply chain. Doesn't work for custom-engineered products. |
Tailored to companies that have high product variety or engineered products. Goal of QRM is not to start a job until there is an order for it. Uses a combination of push for material planning and release, and a modified pull approach to prevent congestion. |
| Provides custom combinations of predefined options for a baseline product. |
Best suited for custom-engineered products. |
| Requires stable demand, mostly for replacement products. |
Used for products with rapidly changing demand or tailored to individual customers. |
| Primary performance measure is on-time delivery. |
Primary performance measure is lead time reduction with on-time performance a by-product of the strategy. |
Inventory is another way to differentiate lean manufacturing and QRM. Lean manufacturing focuses on minimizing the inventory in the system with a relatively stable and predictable demand. QRM is based on individual customized production while maintaining low inventory and quick response.
Cell team members in a QRM organization are encouraged to continuously search for ways to reduce lead times. As a result of this focus and mind-set, processes are improved and non-value-added waste is eliminated.
If you would like to learn more about this highly effective manufacturing philosophy, please contact our internal Q-ROC Manager, Al Fyhrie at (320) 762-7660 or by email: afyhrie@alex-extrusion.com. Al would be happy to answer your questions and explain how Alexandria Extrusion Company has achieved highly successful results through its implementation of the 10 QRM principles. |