How to Sustain Kaizen Improvements: 7 Proven Ways

How many times have you witnessed a successful Kaizen event on the shop floor, in a hospital, or in an office where you made significant improvements, delivered presentations, and celebrated accomplishments?

Then, a few months later, you return to the same area and find the improvements are gone. Everything looks the same as before, and all that hard work seems wasted.

Why does this happen? What should we do when Kaizen improvements fail to last? And most importantly, who should we hold accountable?

Why Kaizen Improvements Fail to Sustain

As Lean practitioners, we know we shouldn’t blame people. Instead, we should examine the process.

When we look deeper, we often discover that the process for sustaining improvements was never properly developed or was too difficult to follow.

I have failed many times throughout my Lean journey. I prefer to call these failures opportunities for improvement, but I must admit that some of those lessons were painful.

Imagine putting all that hard work into organizing a Kaizen event, bringing people together, implementing improvements, and celebrating the results. Then, months later, you don’t even know whether those improvements made a lasting difference.

After experiencing several of these failures, I started asking myself why our Kaizen improvements weren’t sticking.

Eventually, I realized something important: I spent too much time planning the Kaizen event and not enough time planning what would happen after the event.

I had failed to think long-term about what managers and leaders needed to do to sustain the improvements.

Five Mistakes I Made When Trying to Sustain Kaizen Improvements

Looking back, I identified five serious mistakes that contributed to our inability to sustain Kaizen improvements.

1. Not Involving Leaders Early Enough

When developing a project charter or Kaizen event plan, I involved leaders primarily to review the plan and authorize employees to participate.

Many times, leaders told me they didn’t have time to participate. They trusted the team and me to get the job done.

At the time, I thought that was enough. I was wrong.

2. Not Developing Leaders to Sustain Improvements

In some cases, leaders were not involved in the Kaizen event at all.

More importantly, I failed to develop leaders on what they needed to do after implementing the improvements.

We developed the people doing the work, but not necessarily the people responsible for leading and supporting them.

3. Assuming Standard Work Would Be Followed

I believed that once we improved a process, updated Standard Work, and created Job Instructions, everyone would automatically follow the new process.

Unfortunately, that was not always the case.

Creating a standard is one thing. Making sure people understand it, follow it, and continue improving it is something entirely different.

4. Failing to Assign Ownership for Sustainment

We had clear responsibilities during the Kaizen event, but we didn’t always establish who would own the improvements afterward.

Without clear ownership and accountability, improvements slowly disappeared.

5. Not Communicating Changes to Everyone

This was one of the most important lessons I learned the hard way.

I failed to explain the new process to everyone who worked with it or was affected by it.

We didn’t always communicate the key changes, why they were necessary, and how they would benefit employees and the organization.

When we fail to practice one of the most important principles of Lean, Respect for People, and don’t properly communicate changes, people naturally become resistant and return to their old habits.

I am writing this article because decades ago, I wish someone had shared these lessons with me. Perhaps I could have avoided some of those painful mistakes by learning from someone else’s experience.

Seven Ways to Sustain Kaizen Improvements

After learning from these experiences, I began changing how we planned, conducted, and followed up on Kaizen events.

Here are seven practices that made a significant difference.

1. Involve Leaders Directly in Kaizen Events

I began involving line leaders, office managers, and, in some cases, plant managers and directors directly in our Kaizen events.

I made sure every event included someone with decision-making authority and someone responsible for sustaining the improvements afterward.

Leadership participation was no longer optional. It became an important part of our approach.

2. Develop the Team Before Going to the Gemba

Before conducting a Kaizen event, we trained the team on Lean fundamentals.

We wanted everyone to understand waste, continuous improvement, and the importance of observing the actual work.

This helped prepare participants before going to the Gemba, the actual place where work happens.

3. Communicate the Why Across All Shifts

Before the event, leaders discussed the upcoming Kaizen activity during daily team meetings.

They explained why we were conducting the event, what problems we wanted to solve, and what outcomes we hoped to achieve.

We made sure employees across all shifts understood what was happening.

This was our opportunity to lay the groundwork, answer questions, and help everyone understand the why behind the change.

4. Build a Cross-Functional Kaizen Team

We made sure our Kaizen teams included people who performed the actual work, along with employees from supporting departments.

Depending on the process, this included operators, indirect staff, office employees, warehouse employees, and leaders.

One thing I learned was the value of including people unfamiliar with the process.

Why?

Because they ask questions that others may no longer think to ask.

Sometimes, the person who knows the least about a process can help the team see opportunities that everyone else has overlooked.

5. Establish Clear Roles and Responsibilities After the Event

After the final presentation and celebration, we made sure everyone understood their responsibilities for sustaining the improvements.

From team leaders to directors, everyone had a role.

We didn’t want the Kaizen event to end with a presentation. We wanted it to mark the beginning of a new and improved way of working.

6. Use Visual Management and PDCA to Track Improvements

We provided leaders with bowling charts, key performance indicators (KPIs), and other visual management tools to help them monitor performance.

These tools allowed teams to regularly compare actual results against planned targets.

We also trained managers on how to address problems using the Plan-Do-Check-Act (PDCA) methodology.

When performance started moving in the wrong direction, leaders had a process to identify problems, investigate causes, and take corrective action.

7. Implement 30-, 60-, and 90-Day Sustainment Reviews

One of the most effective changes we made was implementing 30-, 60-, and 90-day reviews after Kaizen events.

During these reviews, leaders presented improvement results, KPIs, and sustainment progress to their teams and corporate leadership.

When leaders knew they would be presenting the results after the event, they began treating sustainment as a priority.

This created accountability and encouraged regular follow-up.

Why Leader Standard Work Is Essential to Sustaining Kaizen

As we deliberately developed leaders alongside their team members, I began seeing a significant improvement in our ability to sustain Kaizen results.

Leaders started performing daily, weekly, monthly, and annual layered process audits. These routines helped teams stay on track and identify problems before improvements disappeared.

Previously, we focused primarily on developing Standard Work for employees and Job Instructions for trainers.

But that wasn’t enough.

We also needed to develop leaders on how to create and follow Leader Standard Work.

Leaders needed their own routines to review performance, observe processes, coach employees, and follow up on improvement activities.

When everyone, from frontline employees to senior leaders, has clear standards and follows them consistently, sustaining improvements becomes much easier.

Kaizen Is Not a One-Time Event: Building a Culture of Daily Improvement

After our Kaizen events, we continued reminding employees that Kaizen events were not silver bullets.

They were simply a good beginning.

We explained that sustaining improvements required everyone’s participation and that the processes we had just improved could still become better.

If we treated Kaizen as a one-time activity, we would eventually fail again.

We needed continuous improvement to become part of our daily work, even when no formal Kaizen events were taking place.

Engaging Everyone Through Simple Kaizen Ideas

To support this mindset, we trained everyone, and I mean everyone, on how to use a Simple Kaizen Submission Form.

This easy-to-use tool encouraged employees to identify and implement small improvements in their own work areas.

We asked people to think outside the box and focus on improving the processes they worked with every day.

Employees shared before-and-after pictures and explained the changes they had made.

Some of these improvements were small, but they were powerful.

People began working closely with their supervisors, team leaders, and continuous improvement support staff to implement their ideas.

Most importantly, employees began feeling heard and appreciated.

Of course, not every suggestion was practical or the best solution.

We also trained leaders on how to respectfully explain why an idea might not work and encourage employees to rethink it or propose another solution.

This was another opportunity to practice Respect for People.

Leadership Makes the Difference Between Temporary and Sustainable Kaizen

Before we changed our approach, leaders were not always fully engaged in our Kaizen activities. Some participated only when they were required.

But as we began building a true Lean culture, things changed.

Our leaders listened, participated in training, and became more involved in supporting improvements.

Instead of expecting the continuous improvement team to sustain everything, leaders began taking ownership.

They understood that their role wasn’t simply to approve Kaizen events, but to create an environment where employees could continuously improve their work.

That shift in leadership thinking made a tremendous difference.

Final Thoughts: The True Measure of Kaizen Success

Looking back at my Lean journey, I learned that conducting a successful Kaizen event is only part of the challenge.

The real challenge begins after the event.

We must develop leaders, establish clear standards, communicate changes, engage employees, and create daily routines that support continuous improvement.

Most importantly, we must remember that Kaizen is not something we do only during a three-day or five-day event. We should practice it every day.

We should not measure Kaizen’s success only by what we accomplish during an event. Measure it by what remains improved six months or a year later.

Kaizen creates improvements, but leadership creates the conditions for those improvements to last.

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