Month: February 2010

Parts one and two of this series surveyed the work connected with several goals shared by software organizations and Six Sigma (Goals 1-3 in Table 1). We saw that reaching those goals involved establishing systems to identify defects, classify them according to type and point of origin, predict their occurrence, and assess actual defect find […]

OK, so you are not Hamlet, and deciding whether to become a Six Sigma Black Belt (BB) is not a matter of life or death. But it is a major career move, and you should carefully consider the pros and cons. With a nod to David Letterman, we have created two “Top Ten” lists that […]

When performing statistical data analyses, quality professionals are always challenged to maintain data integrity. When should you round up the answer; when should you round down? How many significant figures are appropriate for the data set that has been taken? Below are a set of simple rules that should help you traverse the perils of […]

When utilizing a team approach to problem solving, there are often many opinions as to the problem’s root cause. One way to capture these different ideas and stimulate the team’s brainstorming on root causes is the cause and effect diagram, commonly called a fishbone. The fishbone will help to visually display the many potential causes […]

Green Belts are employees of an organization who have been trained on the Six Sigma improvement methodology and will lead a process improvement team as part of their full-time job. While Green Belts do not need to know as much as Black Belts or Master Black Belts, there are many things a Green Belt should […]

To plot individual data or to group the data and plot the mean on a control chart, that is the question. Several authors (not including Shakespeare) have weighed in on this issue and I want to present their arguments and then my own. First, let us assume that the process conditions are such that using […]

Measurable improvements in radiology added up to greater efficiency and better quality. In this study, staffing was reduced by 14 full-time equivalents, entirely through attrition; identification errors were reduced through bar coding, and processes were improved. A higher sigma indicates a lower rate of defects and more efficient processes. In many corners of the corporate […]

When clients are not getting the results they expect from their strategic plans, there are usually three overlooked causes – incomplete planning, inadequate links between strategy and action, and poor communication. Are you getting enough from your Six Sigma strategic plan?

Six Sigma is accomplished one project at a time. The billions of dollars saved by companies around the world is the cumulative effect of properly selecting and defining business issues that can be assigned to Green Belts and Black Belts for solution. As you may have read last week, a strategic plan includes planning, adequate […]

Total Quality Management (TQM) is a management approach that originated in the 1950s and has steadily become more popular since the early 1980s. Total quality is a description of the culture, attitude and organization of a company that strives to provide customers with products and services that satisfy their needs. The culture requires quality in all […]

Engineers, Six Sigma practitioners and other researchers often work with “hard” data – discrete data that can be counted and legitimately expressed as ratios. But what of “soft” data, things like opinions, attitudes and satisfaction? Can statistical process controls (SPC) be applied here? Can process variation in customer satisfaction, for example, be measured and then reported to […]

As an outsider to the Six Sigma world, I am immediately astounded at how quickly Six Sigma can change the culture of a company. As a technology consultant, I assist with some Six Sigma projects at a Fortune 500 company. My involvement in Six Sigma projects evolved over time as the head of Six Sigma, […]

One of the more familiar dilemmas in business today is how to implement Six Sigma in small and medium-sized companies. This is a serious issue because larger companies are beginning to mandate Six Sigma to their supply base as a condition of doing future business. The problem arises when small and mid-sized organizations solicit deployment […]

It is well established that there exist eight dimensions of quality: Conformance Performance Features Reliability Durability Serviceability Aesthetics Perceived quality Each dimension can be explicitly defined and is self-exclusive from the other dimensions of quality. A customer may rate your service or product high in conformance, but low in reliability. Or they may view two […]

Hy Sedrate, director of quality for St. Recover in the Longrun Hospital, has been worried about his organization’s future, and more specifically about his own future. St. Recover has been acquired, through a series of complex arrangements, by Santa Cura Hospitals, a large regional organization made up of some two dozen hospitals and clinics. Sedrate […]

Today’s industrial black belt typically trains for six months. Seventy-five percent of this training time is spent learning theory, and the balance is spent in practice. Often when the black belt returns to the real world to tackle inefficiencies, he finds that there are no takers for his logic and passion – his Six Sigma entreaties fall on […]

Have you ever managed a project that just will not end? For those projects that never seem to finish, a common cause is cited. It is not necessarily inexperience of personnel or a flawed technology, rather allowing requirements to pass in and out of the revolving door of project scope. Below are a few simple […]

When DOE (design of experiments) is used for software testing, there is a large amount of savings in testing time and cost. Various users in automotive, telecommunication and defense industries report big productivity improvements to their traditional testing methods. This success is due to two major important factors: 1) focused attention on the usage of […]

Delay the Pain, Beg for Forgiveness Years ago I came to a stark realization of an evolving culture in the business world. Employees at all levels were making, or agreeing to, commitments that they could not keep. In fact, the over-commitment culture was prevalent at the most critical level of the business – the company […]

Six Sigma scatter diagrams and their correlation analyses often debunk management myths. Many times executives assume and/or presume that measures vary together when they do not. Sometimes they assume and/or presume that measures do not vary in concert with one another when they do. For better or worse, budget forecasts are based on these assumptions. […]

From tedious time consuming task to opportunity for improvement. When applying control charts it is common practice to establish the control limits based on the process capability study and then use fix limits on the chart during production. This method is also frequently applied in SPC software programs. The advantage of using fixed limits is […]

This article illustrates the Six Sigma DMAIC (Define, Measure, Analyze, Improve, Control) process using an organization that develops software packages as an example. The Six Sigma DMAIC approach to process improvement provides a powerful mechanism for improving the software process. Typical benefits will exceed costs within 6 to 12 months from initiation of a Six […]

Whether you are a process owner, Master Black Belt or Champion, you will at some point need to interview candidates for an open Black Belt position. Or, you may be a Green Belt or quality engineer with aspirations of someday working full-time as a Six Sigma Black Belt. What should you look for in a […]

Six Sigma, 6s, is nothing more, and nothing less, than the use of science to solve problems. Scientific evidence that a breakthrough medical solution is genuine is statistical evidence. Though altruism and evidence influence medical treatments, economic pressure drives improvement. Multi-million dollar savings created by “beating heart” or “off-pump” coronary artery bypass outcomes are a […]