Introduction to Just-in-Time Manufacturing

Introduction

Just-in-Time (JIT) manufacturing is a key lean manufacturing philosophy and one of the pillars of the Toyota Production System. JIT focuses on producing and delivering materials only when they are needed, reducing excess inventory and waste.

In a JIT system, raw materials, components, and finished products move through production exactly at the required time. This helps organisations reduce storage costs, improve efficiency, increase productivity, and minimise waste.

JIT also supports continuous improvement and better quality. However, successful implementation requires reliable suppliers, accurate scheduling, standardised processes, and strong communication. Although JIT reduces costs and inventory, it can also make organisations more vulnerable to supply chain disruptions.

The elements of a JIT process typically include the following 

As you can see, every lean manufacturing tool is related to each one, then an organisation should apply these tools together, as a system, to accomplish  real lean production. That is why Toyota Production is a system and it has its principals, pillars, supports and elements that will lead to a total lean production system. In other words, Kanban cannot work without standardisation; standardisation needs 5’s to be in place before establishing standards. Just in Time needs the Kanban and visual cards, etc.

Lean production systems require the analysis of the organisational context and needs, and the design of the implementation process, step by step, of each of the tools and philosophies. 

Lean Production System Elements

Lean Implementation Step Chart

Lean Implementation Step Chart Breakdown

Just in time (JIT) has a huge impact in cost reductions and waste because of the use of only the inventory that is needed, as well as the efficiency that just in time requires to avoid any disruption in the supply chain. Therefore, it forces the organisation to be more productive and avoid any type of waste in the process that affects the flow of products from the supplier to the customer, such as, errors in orders, improper material handling and storage, wrong orders, mistakes in processes, etc.

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