In traditional project management, we focus on timelines (Gantt charts). In Flow, we focus on queues.
In manufacturing, variability is evil. In product development, variability is inevitable (R&D is, by definition, an exploration of the unknown). The exclusive PDF explains the "U-Curve" of variability management. You will learn when to absorb variability (batch processing) and when to reduce it (fast feedback loops). In traditional project management, we focus on timelines
Before you grab your exclusive PDF download, let’s look at a few of the transformative principles you’ll find inside the guide. In product development, variability is inevitable (R&D is,
Reinertsen doesn't just say "test often." He quantifies the value of feedback. The exclusive download includes a table showing that a 10x reduction in feedback latency yields a 100x reduction in economic risk. You will learn to design "tunnels" of fast feedback rather than "gates" of slow approval. Before you grab your exclusive PDF download ,
Traditional top-down control fails in complex development. Instead, Reinertsen advocates:
One of the book’s most counterintuitive ideas: idle people are often better than idle information. Keeping people fully busy creates queues that starve downstream activities of information. Instead, deliberately keep some spare capacity to absorb variability and enable rapid response to new information. A 5–10% slack can cut cycle time by 30% or more.
Variability is inevitable, but not all variability is bad. High variability in task arrival or processing time destroys flow. Instead of trying to eliminate all variability (which is costly), Reinertsen recommends decoupling variability using buffers: time buffers (slack), capacity buffers (extra people), or inventory buffers (small WIP limits). The economically optimal buffer size balances the cost of delay against the cost of the buffer.