across the operations, leading to major improvements in productivity, quality,
and safety.
Sequential and Concurrent Continuous Improvement
Initially the implementation begins with reaching a basic level of stability with-
in one cell or line—known as “disconnected stability” (see Figure 3-5, below)—
which is not connected to its customer process or its supplier process. If the
process is a cell or line (multiple operations within one area), the flow phase can
52 THETOYOTAWAYFIELDBOOK
Level Incrementally
Standardize
Create Flow
Stabilize
Single
Operation
"Disconnected Stability"
Stability of a single operation
Single
Operation
Single
Operation
"Multiprocess Connected Stability"
Stability of multiple operations
Level Incrementally
Standardize
Create Flow
Stabilize
Single
Operation
Level Incrementally
Standardize
Create Flow
Stabilize
"Value Stream Connected Stability"
Stability of a Value Stream
Single
Operation
Single
Operation
Single
Operation
Figure 3-5. From disconnected stability to value stream connected stability