the meaning of six sigma,a typical process has been proven to have a shift in its average performance of up to +/- 1.5 sigma over the long term. a long term six sigma process that is rated at 4.5 sigma is considered to have a short term sigma score of 6 sigma..conveyor belt common problem trouble shooting guide 1,6. belt runs to one side for a considerable distance, or the entire conveyor. a. the belt is running off centre as it comes around the tail pulley and/or through the load point. re-track belt, install training idlers on the return prior to the tail pulley. b. build up of material on idler rollers. clean and maintain. install scrapers, brushes, and other.
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conveyor belts - determination of elastic and permanent elongation and calculation of elastic modulus . 10247:1990. conveyor belts - characteristics of covers - classification . 10357:1989. conveyor belts - formula for transition distance on three equal length idler rollers (new method) 12881-1:2008. conveyor belts - propane burner test . 12881
in such cases, one has to resort to a range such as 30-50%, 50-75%, 75-95%, etc. minor lesions of a 10-20% severity is referred to as 10-20% luminal irregularities. arteries that are totally occluded are referred to as total or 100% occlusions.
but there is no fixed percentage: if there is more than 90% stenosis, then the amount of blood being supplied may not be significant, so there may be no point in operating… unless it is giving rise to blood clots flicking off into the brain.
in reply to shayne35626 on 2007-12-03 - click to read. doctors usually misguide the patient by numbers that your blockge is 70%. 70% blockage is normal .you have to drink only warm water as you drink tea and please quit tea for two months. take 75% of your diet as salad.
stenting is essential when blockage of the artery exceeds 70%. cardiologists usually consider the problem of artery blockage as severe when it exceeds 70 percent. in this situation, doctors recommend for the placement of stents via angioplasty method
this is called slip of the belt and is generally expressed as a percentage. the result of the belt slipping is to reduce the velocity ratio of the system. as the slipping of the belt is a common phenomenon, thus the belt should never be used where a definite velocity ratio is of importance (as in the case of hour, minute and second arms in a watch).
so up to about 50% of the stenosis or blockage is acceptable and doesn't require any surgery irrespective of whether there is a history of any mini stroke or stroke or not, and up to about 70% stenosis or blockage is acceptable before surgery provided there is no history of any mini strokes or strokes.
variable: they can be totally occluded or have non signicant plaque. the degree of blockage is expressed in percentage so that 80% or greater is considered for intervention when unilateral or when associalted with symptoms such as tias or if the other side is
from a technical standpoint, six sigma deems a process being acceptable only after achieving a maximum defect rate of 3.4 parts per million opportunities. there is a direct correlation between cpk or ppk and parts per million defects because only cps or pps and cpks or ppks that are greater than 1.50 are achieving this goal (3.4 defects per million).
a. 'mild' narrowing ranges from 15% to 49% blockage of the artery. over time, this narrowing can progress and lead to a stroke. even if it doesn't progress, mild narrowing is a sign of early blood vessel disease and calls for preventive measures.
one final review article noted that, when compared with other surgical procedures performed for non-life-threatening conditions, the success rates for spinal surgery (particularly lumbar fusion) are poor, lying somewhere between 30 and 46 percent. (that’s compared to a 90 percent success rate for total knee replacements.)
once symptoms develop, patients usually fall into one of three categories: 15 to 20% get better. 70% live with their symptoms and manage them through nonsurgical treatments. 10-15% undergo surgery for lumbar stenosis, specifically a laminectomy 1. advertisement.
if someone says 95% stenosis of the external they are pulling that number out of a hat- but it is valid to say really stenosed. nb the internal carotid is notable because there is always forward flow, whereas in the external there is a retrograde puseation in diastole.
1. spinal stenosis is a condition in which the spine narrows, creating a lot of pressure on the spinal cord and nerves in the spine. 2. spinal stenosis only causes symptoms once it causes pressure on the spine and nerves. at that point, symptoms begin gradually and progress with time. 3.
if you have no symptoms, we won’t recommend intervention until the artery is at least 80 percent blocked off. but this isn’t a cut-and-dried metric. there are patients in good health with more
aortic valve replacement is also recommended for asymptomatic patients with severe aortic stenosis accompanied by lv systolic dysfunction (i.e., ejection fraction of less than 50 percent). when
the belt filter press (usepa, 1986). the gravity drainage zone is a flat or slightly inclined belt unique to each model. solids are dewatered by the gravity drainage of the free water. a 5 to 10 percent increase in solids concentration from the original biosolids should occur in
when this happens, it can be life-threatening, so it is important to tell your doctor as soon as you think you have symptoms or your symptoms worsen. after the onset of symptoms, patients with severe aortic stenosis have a survival rate as low as 50% at 2 years and 20% at
10 percent to 30 percent error suggests that the system is acceptable. also, it depends on the importance of the application, cost of the measurement device, cost of repair, and other factors. consider over 30 percent error is unacceptable, and you should improve the measurement system.
what is spinal narrowing. spinal narrowing – also called spinal stenosis – refers to the narrowing of the bone channel occupied by the spinal nerves or spinal canal. although the narrowing can occur at different parts of the spine, the symptoms of nerve pressure are often similar.
first, check the blood pressure in both arms. if it is equal, that points against significant narrowing. next, you will need to images the subclavian artery. an ultrasound should be a first step. on ultrasound, elevated flow velocities and turbulent flow are the markers of significant subclavian artery stenosis:
1 2 3 6 sigma = 68% 95% 99.7% and 99.9999998% (percentage of total area under normal bell curve) http://en.wikipedia.org/wiki/normal_distribution august 22, 2013 at 10:59 am - log in to reply
total number of customers visited in the year: a3 = 135,000 persons. total number of possible complaints: n2 = 135,000 / 7.81 = 17,285 groups (opportunities) possible number of complaints per million customers: n3 = (32 / 17,285) x 1,000,000 = 1,851
it is a variable effect, ranging from under one percent to ten percent and more; and; the portion of rpm comprising slip is near-pure friction, which is converted to heat. why do belts slip? there is a wide variety of reasons v-belts and pulleys slip. some important reasons are: worn pulleys