Kaizen: A Practitioner's Guide to Building a Culture of Continuous Improvement
- Jan 15, 2024
- 11 min read
Updated: 17 hours ago
By Allan Ung | Founder & Principal Consultant, Operational Excellence Consulting
Updated: 27 March 2026
Allan Ung is the Founder and Principal Consultant of Operational Excellence Consulting, a Singapore-based firm established in 2009. With over 30 years of experience leading operational excellence and quality transformation across manufacturing, technology, healthcare, industrial sectors, and global operations—including senior roles at IBM, Microsoft, and Underwriters Laboratories—Allan brings deep shopfloor expertise to every learning room he enters. A Certified Management Consultant (CMC, Japan), Lean Six Sigma Black Belt, TPM Instructor, TWI Master Trainer, and former Singapore Quality Award National Assessor, he has facilitated Kaizen programmes for organisations including Underwriters Laboratories, Fugro Subsea Technologies, Health Sciences Authority, Forum Energy Technologies, Panasonic, Infineon Technologies, Borouge, and Coperion K-Tron.
What Kaizen actually means — and why most organisations misunderstand it
The word Kaizen comes from two Japanese characters: kai (change) and zen (good). Together they mean improvement — specifically, the continuous pursuit of small, incremental improvements made by everyone in the organisation, every day.
That last part is where most organisations go wrong.
Kaizen is frequently implemented as a project. A team is assembled, a focused improvement event is scheduled, results are documented, management is briefed, and the initiative is declared complete. The improvements are real — often impressive — but the underlying philosophy has been missed entirely. Kaizen as a project produces project results. Kaizen as a culture produces compounding results that continue long after any individual event concludes.
I have seen both versions in practice across more than three decades of operational excellence work. The difference in long-term impact is not marginal. It is transformational.
During my tenure as Lean Sigma deployment leader for Underwriters Laboratories (UL) in Asia, I led the deployment of Kaizen across UL's operations in multiple countries simultaneously — China, India, Taiwan, Hong Kong, and Korea — supported by regional General Managers and change agents. The results were documented in UL's internal Going Global newsletter and reflect what disciplined, systematic Kaizen looks like when it is treated as a management system rather than a one-off event.
At UL-CCIC in China, a lab turnaround time Kaizen reduced average Lab TAT from 31 days in July 2005 to 10 days by April 2006 — a 68% reduction — while lab utilisation climbed from 40% to 73% over the same period. At UL Taiwan, a Battery Lab Improvement Kaizen reduced battery TAT by 33%, increased output by 68%, and lifted equipment utilisation by 63%. In UL Hong Kong, a Quick Quote Kaizen saved 5 to 7 minutes per quote and generated 56 man-days of savings per year. At UL India, a cross-functional Integrated Customer Fulfilment Team Kaizen reduced overall turnaround time by 40% over six months, bringing average project turnaround from 29 days down to 19 days.
These were not isolated improvements. They were the cumulative result of a systematic Kaizen deployment — people at every level identifying problems, analysing causes, developing solutions, and standardising what worked.
That is what Kaizen looks like when it is implemented properly.
What Kaizen is — and what it is not
Kaizen is a structured philosophy of continuous improvement rooted in Lean management and originating in the Toyota Production System. It operates on a deceptively simple premise: no process is ever perfect, small improvements are always possible, and the people closest to the work are best positioned to identify them.
What distinguishes Kaizen from general "improvement initiatives" is its combination of three characteristics that rarely appear together in conventional management practice.
The first is universality. Kaizen is not reserved for engineers, quality teams, or improvement specialists. It applies to every person, every process, and every level of the organisation — from the managing director to the frontline operator. When Ng Yoong Tian from Forum Energy Technologies' Manufacturing Department completed a 5S Kaizen and reflected, "Now I can make sure my work of duties are efficient, minimising waste" — that is Kaizen thinking at the individual level. Multiply that shift in mindset across an entire workforce and the cumulative effect is substantial.
The second is incrementalism. Kaizen does not seek breakthrough transformation through large capital investments or sweeping process redesigns. It seeks small, practical improvements that can be implemented quickly, tested immediately, and standardised if they work. The Japanese phrase for this is "creativity before capital" — using ingenuity rather than expenditure to solve problems. This makes Kaizen accessible to organisations of any size and at any stage of their operational maturity.
The third is continuity. A Kaizen event is a vehicle for Kaizen, not Kaizen itself. The event creates the conditions — focused attention, cross-functional collaboration, structured time — for improvements to happen rapidly. But the philosophy that drives those improvements must operate between events, in daily work, permanently. Without that continuity, organisations improve in bursts and plateau. With it, they compound.
Kaizen in practice: what it looks like across industries
The UL Asia Kaizen deployments I described above spanned laboratory services, certification processes, and customer fulfilment — a service-sector context where Kaizen's manufacturing origins might seem remote. They were not. The eight types of waste that Lean identifies — overproduction, waiting, transport, over-processing, inventory, motion, defects, and underutilised talent — appear in every industry and every function. Kaizen's tools for identifying and eliminating them are equally universal.
At Health Sciences Authority's Blood Services Group in 2015, 5S Kaizen workshops for 150 nurses, laboratory officers, and administrative staff applied Kaizen principles to a healthcare environment where organisation and visual management directly affect patient safety and blood supply reliability. The Kaizen Walkabout — where participants toured their own work areas with structured observation guides — consistently produced the most revealing insights of the entire programme, because it gave people who work in a space every day the structured permission to see it differently.
At Forum Energy Technologies in 2015, Kaizen was introduced to the Drilling Technologies shopfloor as a foundation for building a culture of continuous improvement in an oilfield manufacturing environment. The workshop combined 5S principles with visual management tools, grounding abstract Lean concepts in the specific challenges of the shopfloor.
At UL Guangzhou, Kaizen was applied to the handling of samples for testing and the organisation of the sample storage space — two practical, bounded improvement opportunities that generated visible results quickly and built credibility for further improvement work.
In each of these contexts, the Kaizen methodology provided the same structure: a disciplined process for moving from problem identification through root cause analysis to implemented solution and standardised improvement. The industry changed. The framework did not.
The six steps of Kaizen implementation
Kaizen is not improvised. It follows a structured six-step process that ensures improvements are identified systematically, implemented properly, and sustained reliably. These six steps apply whether the Kaizen is a two-hour team activity, a focused one-day event, or a multi-week cross-functional improvement project.
Step 1 — Identify improvement opportunities
Kaizen begins with observation. Encourage employees at every level to look at their processes with fresh eyes — to notice inefficiencies, waste, quality issues, and friction points that have become invisible through familiarity. The Kaizen Walkabout, in which team members physically tour a work area with structured observation guides, is one of the most effective tools for this step. So is the suggestion system — a mechanism for capturing improvement ideas from frontline staff on a continuous basis, not just during formal events.
The quality of everything that follows depends on the quality of observation at this step. Teams that rush to solutions without genuinely understanding the current state tend to implement changes that address visible symptoms rather than underlying causes.
Step 2 — Analyse the current process
Once improvement opportunities have been identified, the team analyses the current state to understand what is actually happening, why it is happening, and what the gap is between current and desired performance. Simple tools serve this step well: process mapping to make the flow visible, cause-and-effect diagrams to structure the investigation, and 5 Whys to drill from symptoms to root causes.
This is the step most commonly shortchanged under time pressure — and the one whose quality most directly determines whether the improvement will hold. A solution that addresses the wrong cause will not produce lasting results regardless of how well it is implemented.
Step 3 — Develop solutions
With the root causes understood, the team brainstorms practical improvement ideas. The guiding principle here is creativity before capital: the best Kaizen solutions are simple, low-cost, and implementable quickly. Complex, expensive solutions belong in a different improvement methodology. Kaizen solutions should be testable within days, not months.
Involve the people who do the work in developing the solutions. Their contextual knowledge is irreplaceable, and their ownership of the solution is what determines whether it will be sustained after the event concludes.
Step 4 — Implement changes
Apply the proposed solutions in the workplace, with the people who will use them actively involved in the implementation. This is where Kaizen becomes tangible — where ideas become physical changes to processes, layouts, tools, and standards. Document the before-and-after state with photographs, measurements, and specific descriptions of what changed and why.
The implementation step is also where the team tests the solution's effectiveness and adjusts where needed. Not every improvement idea works exactly as intended. The willingness to test, observe, and adapt without abandoning the overall improvement goal is a characteristic of mature Kaizen teams.
Step 5 — Evaluate results
Measure the outcomes against the goals established at the outset. Use relevant metrics — cycle time, defect rate, floor space recovered, inventory reduced, safety incidents, turnaround time — to quantify the improvement. The UL Asia Kaizens produced precisely this kind of measurable evidence: TAT reductions expressed in days, utilisation increases expressed as percentages, time savings expressed in man-days per year.
Measurement serves two purposes. It validates that the improvement delivered real value — which is essential for maintaining credibility and momentum. And it provides the evidence needed to communicate the improvement to management and to motivate further Kaizen activity across the organisation.
Step 6 — Standardise and sustain
Document the improved practice, update standard operating procedures, train the people who work in the area on the new standard, and share the lessons learned across similar processes and teams. This is the step that converts a one-time improvement into a permanent capability.
Standardisation without follow-through is paperwork. Effective standardisation means the new standard is the way work is actually done — verified through regular audits, reinforced by leadership behaviour, and embedded in the daily management routine. Without this step, Kaizen improvements erode. Processes drift back toward their previous state as people revert to familiar habits and new staff are not trained on the improved method.
The Kaizen mindset: ten principles that make it work
Beyond the six steps, Kaizen is sustained by a set of principles that govern how improvement teams think and behave. These are not aspirational values — they are practical operating rules that determine whether a Kaizen event produces genuine improvement or merely the appearance of one.
Be open to change. The most significant barrier to improvement is the belief that the current way is the best way. Kaizen requires the willingness to question established practices and consider alternatives without defensiveness.
Stay positive. Improvement work surfaces problems. Treat every problem as an opportunity rather than a failure.
Speak out if you disagree. Silent agreement during a Kaizen event followed by passive non-compliance during implementation is the most common cause of Kaizen failure. Create the space for honest dissent during the event so that genuine consensus can be built.
See waste as an opportunity. Every identified waste is a source of recoverable value — time, space, cost, or quality that can be reclaimed through improvement.
Maintain a no-blame environment. If people fear that identifying problems will result in personal criticism, they will stop identifying problems. The Kaizen environment must be explicitly no-blame.
Creativity before capital. Reach for ingenuity before expenditure. The best solutions are often the simplest ones.
Ask the obvious questions. The most revealing questions in any Kaizen are often the ones that seem too simple to ask. Why do we do it this way? What would happen if we stopped? Who does this actually add value for?
Understand the data and principles. Ground every improvement in evidence. Opinions are a starting point, not a conclusion.
Just do it. Kaizen produces results through action, not planning. Implement, observe, and adjust rather than planning indefinitely.
Treat others as you want to be treated. Kaizen is collaborative by nature. Mutual respect within the team is not a soft consideration — it is a functional requirement for honest, effective improvement work.
The 5S Kaizen event: Kaizen in its most visible form
The 5S Kaizen event deserves specific attention because it is the most widely practised and most immediately visible form of Kaizen activity — and the one with the most direct connection to the 5S workplace organisation system described in our companion article.
A 5S Kaizen event applies the Kaizen methodology specifically to workplace organisation — using a focused, time-bounded event to Sort, Set in Order, Shine, Standardise, and Sustain a targeted work area. The UL India Kaizen captured in the photograph above shows exactly this: a team in the Sort phase, physically removing unwanted materials from the workplace. What looks like a simple clean-up exercise is, when conducted with proper discipline, the first step in a transformation of how that space functions — and how the people who work in it think about their responsibility for it.
For a detailed guide to planning and conducting a 5S Kaizen event — including how to select the right area, define the charter, avoid common pitfalls, and sustain the improvements — read How a 5S Kaizen Event Can Transform a Cluttered Workplace.
Why Kaizen matters now more than ever
In a business environment characterised by margin pressure, skills shortages, and increasing operational complexity, Kaizen offers something that no technology investment or restructuring programme can replicate: the systematic engagement of the people closest to the work in the continuous improvement of that work.
The organisations I have seen sustain Kaizen most effectively over time share a common characteristic. Their leaders practise Kaizen themselves — they walk the gemba, they ask questions, they acknowledge improvements publicly, and they treat the suggestion system as a serious management tool rather than a staff engagement exercise. That leadership behaviour is the signal that communicates to the entire organisation whether Kaizen is genuinely valued or merely performed.
The six steps are learnable in a day. The culture takes years to build — and it starts with leadership.
Build Kaizen capability in your organisation
At Operational Excellence Consulting, I deliver customised Kaizen workshops and Lean implementation programmes for organisations across Singapore and the Asia-Pacific region — grounded in real operational contexts across manufacturing, healthcare, engineering, and professional services.
Explore our practitioner-led Kaizen resources:
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About the author
Allan Ung is the Founder and Principal Consultant of Operational Excellence Consulting, a Singapore-based management training and consulting firm established in 2009. With over 30 years of experience leading operational excellence and quality transformation in manufacturing-intensive environments, Allan's expertise spans Lean Thinking, Total Quality Management (TQM), TPM, TWI, ISO systems, and structured problem solving.
He is a Certified Management Consultant (CMC, Japan), Lean Six Sigma Black Belt, TPM Instructor (Japan Institute of Plant Maintenance), TWI Master Trainer, ISO 9001 Lead Auditor, and former Singapore Quality Award National Assessor.
During his tenure with Singapore's National Productivity Board (now Enterprise Singapore), Allan pioneered Cost of Quality and Total Quality Process initiatives that enabled companies to reduce quality costs by up to 50 percent. In senior regional and global roles at IBM, Microsoft, and Underwriters Laboratories, he led Lean deployment, Kaizen implementation, and cross-border operational transformation across Asia.
Allan has facilitated Kaizen and Lean programmes for organisations including Underwriters Laboratories, B.Braun, Fugro Subsea Technologies, Ministry of Social & Family Development, Health Sciences Authority, Forum Energy Technologies, Panasonic, Micron, Sika Group, and Tokyo Electron. He holds a Bachelor of Engineering (Mechanical Engineering) from the National University of Singapore and completed advanced consultancy training in Japan as a Colombo Plan scholar.
His philosophy: "Manufacturing excellence is achieved through disciplined systems, capable leadership, and sustained execution on the shopfloor."
His practitioner-led toolkits have been utilized by managers and organizations across Asia, Europe, and North America to build Design Thinking and Lean capability and drive organizational improvement.
👉 Learn more at: www.oeconsulting.com.sg
Further Learning Resources
This article forms part of the hub of OEC's Lean Thinking content cluster. Each spoke article explores one dimension of Lean in depth:
Hub article
5S Workplace Organization
Kaizen
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Value Stream Mapping
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