All 3 entries tagged Dfss

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February 22, 2014

Power Struggle

Today I thought that there is a slim border between the democratic leader and ineffective leader. What I mean is basically if a leader want to seem more democratic and do not have power to take tough decisions, and followers drive the organization, we do not need to have a leader which is honestly ineffective leadership, so followers can break the bonds of leadership. I do not think that taking over the leadership from the ineffective leader is an issue, if you have high amount of followers. Being more democratic always has always scared me, because honestly I felt that I cannot control the discussions and lead the team through the right path.

However, what I have learned from this module is actually I am able to control the discussions going around and lead effectively (according to assessments), although I didn’t use my autocracy over followers.

Finally, I really thank to my brilliant team who are Vincent, Jaat, Sandra, Osama, Kwang. It was a great pleasure to have worked with them.


January 20, 2014

DesignX and Case Study

After one week break, it was a good beginning with Design for X. Design for X can be seen as a design for everything such as design for manufacturability or design for environment. For instance, if we assume that we are dealing with a project which is about manufacturing a water pump. We can categorize our design aims into different categories just I did as above. Actually this module provides us how much design has a role or impact on innovation. Yes, I will call it innovation! DesignX looks the project from different perspectives of views. For instance, not only covering the issues about serviceability or reliability of product in future, but also may include design for environment. Actually, DesignX wants to show that designing a product is not just manufacturing the product, but also being ready to following issues.

In today’s case study was about an aircraft crash in 1989. As a mechanical engineer, I exited about both today’s topic and case study, because I am very familiar with this topic and I have been doing this kind of analysis more than 5 years. The video showed us that due to explosion at the tail engine, hydraulic system was lost. With pilot’s outstanding exertion, 185 people were survived surprisingly, even 111 people died.

According to our team’s great investigation and my interpretation, due to lack of know-how of one more vacuuming process which is called triple-vacuum process in the beg-70s, the melted titanium reacted with air and had impurities in its micro-structure. These impurities caused cracks on the edge of fan disk which could be seen minor issues on those days, when the engine was freshly manufactured by GE. However, cracks can propagate over time due to fluctuating pressure levels and then reduced the strength of parts furtively. Even though engineers estimated fatigue life (useful life) of engine 25, it suddenly exploded in 17th year and gave damage to hydraulic system. Second major design failure was that there was no back-up hydraulic system that can be operated in case of emergency. Actually, nowadays aircraft are supposed to be checked by ultrasonic devices in order to prevent any fatigue problems and the aircrafts have 3 have hydraulic systems.

January 10, 2014

First impressions about Design for Six Sigma

Even though the DFSS and original Six Sigma sound like similar terms, there are several differences between them. The Design for Six Sigma (DFSS) module is more end user based than Six Sigma, because Six Sigma aims to get rid of variability and incapability in the system and cares more about internal issues in the business. However, DFSS captures the wide perspective of market. Although it is stated in many sources that DFSS is product based, I don’t agree that it is simply product based because products are purchased by customers and they should be designed with respect to customers’ desires and beliefs, just as how we were taught in our Creating Busıness Excellence course. Paul Roberts wrote in class: “product and customer” on the board, and asked which one king is. Then he said that CUSTOMER is the KING! Customers have a free will and they can buy whatever they want, though the product is foolish! Even your product may be the most qualified product ever on the market or the most innovated, in some cases it doesn’t work!

However, DFSS catches and interprets customer feedbacks or thoughts, and then produces a new product according to the design X approach. Design for reliability, and maintainability are the subgroups of designX.

Lastly, I am enthusiastic about PEUSS and glad to have 1 week break :) Now we should read and prepare for the lecture week!

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