The ultimate goal of an LSS project is to improve the quality of the final product while minimizing costs.
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Process improvement is carried out under Lean Six Sigma to improve process efficiency. When a process begins to function at its optimum level, the quality of the end product is also enhanced. The goal of both Lean and Six Sigma is customer satisfaction at minimum cost. Whatever activity or resources do not add value to customers is considered waste and eliminated. By identifying and removing errors, defects and waste, Lean Six Sigma achieves quality improvement, thereby ensuring customer satisfaction.
The Five Phases of Process Improvement
Each phase of process improvement includes specific steps to identify defects, eliminate them and control the results. The five steps that Lean Six Sigma uses under DMAIC to achieve process improvement are:
- Define
- Measure
- Analyze
- Improve
- Control
Each of these five steps involves the use of specific tools for recording and analyzing data, identifying limitations, and implementing improvement. The advantage of using LSS for process improvement is that it sustains the optimization achieved to provide long-term results.
Tools Used for Process Improvement
Lean Six Sigma uses various methods of data collection, analysis and application for improving the efficiency of processes. Some of the tools used to achieve process improvement are:
- Process Focus – Defining the goal of a process
- Process Map – Records the activities in a process for analysis
- Capability Analysis – Analyzing the present ability of a process to determine if they are meeting specifications
- Inferential Statistics – Used to achieve a general judgment or a conclusion on a particular area based on the data available on it. For example, if you want to find out what your customers think about your brand, then you may base your conclusion on the relevant data, such as customer feedback.
- Multi-Vari Graphs – These are used to spot variations within a process
Along with these, other tools such as advanced process modeling, hypothesis testing, value-stream maps, residuals analysis, Multiple Linear Regression Analysis (MLR), and 5S are also used to improve a process and maintain the results achieved from the improvement.
Better Quality, Lower Costs
Organizations can substantially reduce variations in processes, and eliminate errors and waste by implementing LSS. Both preventive strategies (Poka-Yoke, 5S) and elimination of errors are used to improve the quality of the end product without wasting resources on it.
Lean Six Sigma has been providing sustainable benefits to organizations around the world through the use of scientific techniques for process analysis, improvement and control. The dual benefit of improving the product quality and reducing costs helps organizations to stay highly competitive in a dynamic market.
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