Improve phase is the fourth phase of Lean Six Sigma projects. Following are the deliverable of this phase:
Proposed solutions can be a new process, technology change, policy changes, alterations of inputs, measurement system refinement, customer, employee or vendor education, etc. In such cases, either revised process map, future state value stream mapping, etc., may need to be proceeded. The solution that the team has selected should directly impact the CTQ of the project. Six Sigma Green Belt should validate this.
Before implementing solutions, the Six Sigma Green Belt needs to ensure that the proposed solutions are complete and well refined. This will ensure that there are no delays, rework during implementation, and the full impact on CTQ is derived. In order to do this, a tool called Failure Modes Effect Analysis (FMEA) is used. The main purpose of this tool is to assess all the risks involved with a solution, and how to mitigate them by refining the solution before implementation. Risk Priority Number (RPN) derived from FMEA helps in prioritizing the risks and acting on them in a systematic manner.
In Lean Six Sigma Projects, it is an important step to statistically validate the impact on CTQ (before implementation & after Implementation). Hypothesis tests like 2-t test, ANOVA, Chi-square tests, etc., are used to perform this statistical validation. These tests help to identify if the improvement is significant or marginal in nature. Six Sigma Green Belt should be able to select and perform appropriate tests using statistical softwares. On successful completion of these deliverable and formal Improve tollgate review, the Lean Six Sigma project team is ready to move to the Control phase.
Control phase is the fifth and final phase of Lean Six Sigma projects. Following are the deliverable of this phase:
Control Plan or Process Management Plan is a document ensuring that a robust mechanism to monitor and follow-up is established before the solution is implemented. Most Lean Six Sigma projects don’t exist after a few years of implementation. Usually, it is because of a poor control plan. A control plan covers: which metrics will be monitored, method of monitoring, how often, by whom and what has to be done when they go out of control (aka Reaction Plan).
As a part of the control plan, the method of monitoring has to be specific. Statistical Process Control uses well known Control Charts or Shewhart Charts. A control chart, computes the lower and upper control limits as a threshold to monitor any process measures; like CTQ. As the threshold is breached, the reaction plan has to be triggered. As the name suggests, it is a chart that is based on the principles of statistics, and hence there are no false alarms. Instilling the discipline of creating control charts and monitoring as per Control Plan is part of the rigor of a Lean Six Sigma Green Belt.
The last deliverable of the Lean Six Sigma project is Benefits Computation and Closure. But before that, the project is monitored for enough time (2 weeks to 2 months) to ensure that benefits are sustained. When the Lean Six Sigma Team is satisfied with the results, then the improved process is formally handed-over to the process owner. Financial and non-financial benefits are computed based on actual results, and a formal sign-off from the finance manager and sponsor is obtained. This will be the project closure. The Lean Six Sigma team celebrates its success; distributes rewards for active team members; and finally the Six Sigma Green Belt Certification Ceremony is undertaken.
Analyze Phase of Lean Six Sigma Project is the third phase. Following are the deliverable of this phase that Six Sigma Green Belt should deliver with her team:
In a recent Lean Six Sigma Project kick-off meeting of one of my clients, after the teams presented their project charters, the business leader made an extempore announcement that the best and most successful Lean Six Sigma project will receive a special recognition and the team members will be lucratively rewarded.
Immediately few of them wanted to know what criteria will be used for selection. The business leader indicated that I will be the one who will define the criteria for successful Lean Six Sigma Project.
Factors that I consider among the criteria for success of Lean Six Sigma Projects are arranged in the descending order of their importance in the below list:
Based on my experience with Lean Six Sigma in the last 2 decades, I would consider these 6 factors as significant elements of successful project.
In a recent Lean Six Sigma Project kick-off meeting of one of my clients, after the teams presented their project charters, the business leader made an extempore announcement that the best and most successful Lean Six Sigma project will receive a special recognition and the team members will be lucratively rewarded. Immediately few of them wanted to know what criteria will be used for selection. The business leader indicated that I will be one who will define the criteria for successful Lean Six Sigma Project.
Factors that I consider among the criteria for success of Lean Six Sigma Projects are arranged in the descending order of their importance in the below list: Project Scope – Lean Six Sigma projects without well-defined scope are bound to fail, but they end up creating a lot of mess around. Scope usually refers to the boundaries of any project. A poorly defined project is one which hasn’t balanced the Project Goal, Scope and Timelines. Also, poorly communicated scope and not defining what is out of scope are equally important.
Retains interest and commitment of the resources – Improvement projects are successful when its team members contribute their best. Lean Six Sigma projects usually challenge the existing paradigm. Hence without the wholehearted and continued participation of the team members, no project will be successful. The sponsor/champion and the Green Belt/Black Belt are entrusted to retain the interest and commitment of the resources. Attracts adequate buy-in from key stakeholders – Stakeholders of any project could either be the decision makers, important players who influence the decisions or even impacted parties. Successful Lean Six Sigma projects will have to manage the expectations of all the above stakeholders from time to time and create adequate buy-in. Rather than focusing too much on technical root cause analysis, the emphasis should be on how Lean Six Sigma project can bring about mid-to-large change in the organization. Flawless execution– Immaterial of the breadth and depth of the analysis done in any Lean Six Sigma project, what sticks out is execution. Well led and implemented the project is bound to be successful, as even the quality of data collected and analysis is a function of the flawless execution. Adherence to weekly team meetings, project milestones, and tollgates reviews are some simple and easy signs to evaluate execution. Further unbiased data collection and analysis, open minded assessment of solutions, in-depth piloting and sustained monitoring are additional measures of flawless execution. Identifiable impact on customers– As the proof of the pudding is in the eating, so is the success of any Lean Six Sigma in positive impact it creates on customers. Usually, organizations evaluate the success of projects based on the performance of the CTQ (before-after studies). While this is definitely a good way to assess the impact, more often than not such movements in CTQs aren’t felt by customers. Considering several other business parameters to validate the impact of the CTQ, including post improvement Voice of Customer may be a very good method. For example, a reduction in defects certainly will reduce the rework effort, increase productivity, reduce complaints, apart from increasing customer satisfaction. Making a discovery – Any successful Lean Six Sigma project should unearth something new, make a discovery about the problem. A project without a discovery could mean we are fixing obvious things. In order to ensure the project team makes a discovery, the quality of work done in the Measure and Analyze phase have to be evaluated. Have the teams identified all possible causes to the problem? Have they collected data of good quality and quantity? Have they holistically analyzed the data to make the discovery? And finally what is the discovery? Based on my experience with Lean Six Sigma in the last 2 decades, I would consider these 6 factors as significant elements of the successful project.Whatever is the nature of your business, innovation is critical today. In order to survive competition and be the customers’ choice, you need to come up with really new products and services. All it means is that your ability to manage the change is a direct measure of your success. In other words, timely launch of new products/services in desired quality and price are going to determine your success, apart from cultural change aspect. So whether you want it or not, good project management skills are essential in today’s business to survive and win. Without digressing on other pre-requisites of good project management, let’s focus on one of most important but rarely focused area.
There are several project management techniques and tools available such CPM, PERT and Critical Chain. Immaterial of the base on which these models are structured, out of my experience, everything finally boils to predicting time duration for a task and the delivering as predicted. In small organizations(less than 10 employees), it is more of coordination, multi-tasking and communication that will determine if a task can be completed as predicted. But with organizations involving a few tens of employees, it is all about how resources and efforts are synchronized. There may be lack of knowledge of what is to be done next, on who owns which piece, how & when to escalate lack of clarity on authority and decision making. Additionally unlike bigger organizations, smaller companies will have to manage with inexperienced and understaffed scenarios. So to make life easy for everyone, if processes associated with project management such as supply chain management processes, finance processes, clearly defined inter-department service levels and authorities, etc., are established well, that will help the organization deliver projects in time. Isn’t this what ‘Process Management’ is all about! Mathematically also it makes sense to focus on process management. For instance, consider the PERT model in which the PERT Time (Task duration) is a function of Optimistic Time (OT), Most Likely Time (MLT) and Pessimistic Time (PT). When OT and PT are wide apart, it means that it is not possible to predict the task duration accurately. In other words, the process on which the task is dependent has high variation. Such a process leads to higher PERT Time. When all the tasks of the project have widely spread OTs and PTs, the overall project duration itself will be high and unpredictable. In order to have closely defined OTs and PTs, we should have confidence that our processes will consistently deliver on-time. In other words, our process should be statistically under control and stable. Again, it’s Process Management!
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