All entries for November 2010
November 30, 2010
when talk about the continuous improvement, thinking about what enterprises are doing well and maintain in the market for long time, like Cocalola,nokia,hp etc, bud do any one metioned Chanel, Dior, Estee Lauder..these luxury brands.
most of them starts from 20 centry, LV, Hermes, Chanel,GUCCI they all have a long industry life time at making bags, perfume, make ups. especially the handbags, they all very expensive, one hermes bag can equal to a car!
but why they exist? their price is expensive, and products do not innovated every year?
the effectness of brand! it is the most easiest way to make money from women...
during the economic cirsis,nearly all industry sales went down ,but the sale volume of Dior's lipstick kept increasing,even more than previous market figure.
rearch shows that women want to attract their husband or boyfriend, they make up to be sexy. especially when it comes to a difficulty time for their guys business.they may be upset or diappointed.
this stranges situation always happens in women's shoes,make ups, handbags , they run business depending on women's requirements, design products to be attractive for women.
women never be stingy to themselves.
maintain the market should know the characteristic of the market first.
Cp or Cpk stands for process capability index.
it means in a specific period, what's the capability of the process to produce products at a stable ,controable level.
operator ,machinery , materials,envrionment and technology this five main factors effect the process consistently, and the final production is effected by this five major factors.
during the production process, variation always exists. Cp compares the process spread to the width of the tolerances, tolertances should be at least as wide as the process is or more wider.
but Cp is not enough, may the tolerance of two process is same but one of them not lacated into the limits, Cpk is needed.
it measures the likehood of producing non-conforming product of the process. Cp compares the distance from the process centre to either tolerance, Cpk measurs the distance from top/bottom to the centre.
the process best situation is that Cp equals to Cpk. Cpk will never exceed Cp.Cpk can be negative if centre is outside of the control limits.
leaders and employees are both essential within an organisation.
which one is more important,i.e is more effective to drive the organisation?
from my point of view, leader is more important.
genius and talents are existing among empoyees, they may from the production line familiar with manufacturing skills,they may technical staff..but what happens if they were not positoned or talent ignored?
thats a huge waste to the organisation! even they may not statisfy with the team, and leave.
this need good leaders to guide them,listen to them.
one of my friend she is really a good worker, get into a company with huge passion, think she will do very good.
but after half an year,she quit. she said although it took one hour to go to the company every morning and have to over work everyday, it dosent matter because she love her job. but when time move on, she found the management system is terrible, most staff is unhappy with the company, sales went done and no bright future for that.
after i heard this, i believe that how a good leading team is important.
100 talent idea means nothing only when can be gathered!
November 29, 2010
Roger's presentation provide a great experimental understanding to taguchi method.
he showed the sample of a warhead and how to use taguchi method to make the lip match the filling.
pointed out what control factors are, like header too design, pot design, bitumen height, cooling in cone,
and then carry out experimental results like the day we did helicopter exercise.
different consequences give different answers, this way provides all possible situation to find out what the best results and the resluts fall in to the limitation.
the noise ratio measure the robustness of the system. noise factors are those variables which infulence the system but cant be controlled by designer. customer usage conditions, wear states or manufacturing process variation may be too expensive or impossible to control, but we have to consider them when make a product.
maybe in theory ,taguchi method is not special, means just gather the other management theroy,
but in practice, it's really usefull, as least it can find out unstable factors correctly and ananlyse the noise factors.
before thinking the main factors about continuous improvement, we should know why we need to improve.
Obviously, nobody is perfect,same as the enterprise. The top companies still have problems no matter the size.
there's is no end to keep learning and improving.
externally, the business envrionment is changing everyday. if the organisation want to be sustainable in such a competitive market, it has to be continuously improved. maybe the advantage you achieve today will not maintaion tomorrow.
from previous days reading and learning, i think if an enterprise want to win, it has to have a HIT product.
especially the technology industry, it is easy to fail. an organisation should have a high quality product meet the market demands, and has its own feature.
secondly,an co-ordinated team is essential. maybe not the top managers but those production workers, knows what the real problems are. all team members should aim at the same goal and working in close collaboration.
thirdly, a cohesive internal envrionment is needed. chanllenge and competitive both exist. Qualified and talented people is most important source to the organisation, the outflow of these talents is really a waste to the organisation,and the organisation may not able to catch up with the dynamic market.
November 26, 2010
after have an overwiew about taguchi method, an economic way to increase the quality comes up.
some industry always focus on final checking process rather than reduce costs by designed process.
robustness is the key concept. it provides an innovation concept to the industy about increasing quality,reducing loss.
not in production stage but in design stage.
creat great value using cheap and basic materials, ensure the process is stable and minimise the effect of these environmental noise.
using this concept, enterprise can creat value not only depending on purchasing newest machinery or materials.
after 3 times design,products are usually capable,great quality.
becasue Taguchi method reduce loss at initial process, use cheap materials can still produce good quality, it is really beneficial to the industry.
November 24, 2010
yesterday we did a great exercise lecture from Graeme to make model planes within time required.
although team2 is faster than us,i think we still did an excellent job.
after trial, we redesigned our layout to improve the process, operation process is well splitted,and only 4 operators and 1 supplier,labour cost saving. finally,8 out of 11 planes was deliveried whin the target time. around 2 sigma we reached.
but one important thing comes to my mind is listening.
During our discussion, some members have a lot of ideas, it is good,but I think we need to listen to others idea not only think about yourselves. Team means cooperation, we spent too much time on theory thinking, chatting rather than doing practice.
although Define is important, but theory never make sense without exercise. If each of us can listen to each other, lot of ideas can be gathered, and then discuss which is best, we can try it, thats criteria base ,not interput others make them to agree with your own ideas. This problem reduce our efficiency and even the passion of the group.
I think from the other side of view, leadership is required. running a team based operation without a leader is terrible!
November 16, 2010
working on PMA about continuous improvement.
EFQM model is an open mind tool can be used in different ways such as : holistic self-assessment, targeted self-assessment or buisness process assessment.
a foundamental principle associated with continuous improvement is 'the impetus for improving starts with an open and honest recoginition of a situation or a process where there's a scope for improvement'
come to a thinking, if we want to improve ourself, the first step should be understanding who we are, but sometime we 'know' what our capability is, we wont make an effort to do something we think we can't achieve.
this 'well known' about myself is annoying because it makes me not that brave and not to try.
sometime know too much clear about the current situation will set back the improvement because the fear to lose.
people can achieve more successes when he can make a dream.
potentialities is exploited by having 'big heads'.
November 10, 2010
Deming's basic quality philosophy is that" productivity improves as variability decreases"
there are 2 types variation:chance and assignable. but the most difficulty problem is how to comprehend them.
Common cause variability is a source of variation caused by unknown factors that result in a steady but random distribution of output around the average of the data. Common cause variation is a measure of the process's potential, or how well the process can perform when special cause variation is removed. Therefore, it is a measure of the process technology. Common cause variation is also called random variation, noise, noncontrollable variation, within-group variation, or inherent variation. Example: Many X's with a small impact.
Unlike common cause variability, special cause variation is caused by known factors that result in a non-random distribution of output. Also referred to as "exceptional" or "assignable" variation. Example: Few X's with big impact. Special cause variation is a shift in output caused by a specific factor such as environmental conditions or process input parameters. It can be accounted for directly and potentially removed and is a measure of process control.
one of the most effective quality tool to distingguish them is control chart.
but as we know there are two types of mistakes exist in statistics:error of the first kind and error of the second kind.
firsrt one is objective right but we think its wrong after we analyse the data, think there's special causes exists.(right ¡úwrong)
second one is that special causes exist but we think it is common, cannot find the problem.(wrong ¡úright)
so, problems always exist. when data appear out of 6sigma,we have to know it's only a phenomena not the nature of this situation.
after initial analysis,take action to the assumed special causes to test whether it's special or not. if it is not, the first error comes up,our aim is to minimize the happening probability of these two errors.when quality level reaches 3 sigma this probability is lowest. so this is why +-3sigma in the control chat as nature limits.
if data locates out of the up and down limits, special causes may exist.
if data not distributes radomly within limilts,special causses may exist.
some industry will use 2sigma as nature limits will increase the probability of the first kind of error.this will waste some time but make sure more special causes can be found.
some industry use 4 sigma as nature limits increase the probability of the second error decrease the first one. sepcial causes will be ignored.
if the process is not stable , a lot of sepcial cause exists means the system is out of control ,we need to improve the process.
before i only heard about the SIX SIGMA as a managment method after had lacture I start know deeper about it.
From my understanding, six sigma is a quality mgt which uses statistical methods to seek perfect manufacturing,minizing costs,increasing productivity and put customer satisfaction at first place.
when sigma figure goes up, variation goes down.
traditional quality managment always focus on results, they ensure the quality by emphasizing on final product checking and customer service whlist six sigma emphasize on actual causes of these variation. Quality is maintained by improving the process saving original cost rather than checking the final product strictly.Because during the production process these waste products already make a loss, after service will make another amout of costs.