In mathematical queuing theory, Little’s Law is a fundamental theorem proposed by John D. C. Little. Despite its mathematical origins, the law has deep and practical relevance for lean manufacturing and operations management. Little’s Law and Lean Manufacturing Little’s Law reinforces two core lean objectives: 1️⃣ Increase Throughput (λ) 2️⃣ Reduce Throughput Time (W) Since…

In most manufacturing shopfloors, machines and machine tools are the largest capital investments. Significant money goes into acquiring them, and naturally, owners expect these assets to generate value—not sit idle. Ideally, machines should spend the majority of their time producing saleable parts. In reality, however, productive time is steadily eaten away by losses such as…

In many organisations, Lean is misunderstood as a collection of isolated tools. In reality, Lean is a management system. Tools matter—but only when they are applied deliberately to create flow, stability, and continuous improvement. The following seven tools form the core of any serious Lean transformation. When deployed together, they move organisations beyond efficiency gains…

A friend and colleague who had been reading my recent posts on lean manufacturing posed an interesting question: My answer was simple: “It’s hiding somewhere in that list. Finding it is an interesting exercise.” Let’s take a step back and look at each of the seven wastes more closely. The answer reveals itself quite naturally.…

Another powerful insight comes from Taiichi Ohno, one of the founders of the renowned Toyota Production System (TPS). The following excerpt is taken from a conversation between Norman Bodek and Taiichi Ohno, as recounted by Norman Bodek in the foreword to the book Toyota Production System. This deceptively simple idea lies at the very heart…

One of the most significant items on the list of wastes in lean manufacturing is in-process rejection, commonly referred to as defects. This form of waste results in either scrap or rework—both of which disrupt the smooth flow of the manufacturing process and directly erode productivity. To truly understand the impact of defects, it is…

Before we dive in, let’s start with a quick quiz. What do you think is the tyre change time in Formula 1 racing? Less than two seconds. While this level of speed is impressive—almost expected—in motorsport, changeover time is no less critical in manufacturing. In fact, within the lean manufacturing paradigm, changeover is one of…

When embarking on a lean journey, it is critical to focus your efforts where the potential gains are the highest. Lean is not about doing everything at once—it is about choosing the right battles. Based on my extensive industrial experience, the following areas consistently deliver the most impact when targeted early in a lean transformation.…

Lean manufacturing is one of the most written-about concepts in modern industry. Books, articles, frameworks, and certifications abound. Yet, despite this vast body of knowledge, the true essence of lean often remains misunderstood. Many professionals working in mass production environments find it surprisingly difficult to explain what lean actually stands for. So, what is lean…