Toyota Way Fieldbook : A Practical Guide for Implementing Toyota's 4Ps

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