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A: Given:P1=1550 kPaT1=288°CP2=980 kPam=0.453 Kg/s
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- A process is in statistical control with and ?= 39.7. The control chart uses a sample size of n = 2. Specifications are at 40 ± 5. The quality characteristic is normally distributed. How much improvement could be made in process performance if the mean could be centered at the nominal value?(a) A very important component of a system has a mean time between failures of 100 hr and a mean time to repair of 10 hr. Determine the inherent availability of the system. (b) If the equipment in Q7 (c i) above is required to meet an inherent availability requirement of 0.985 and a mean time between failures of 100 hr. Calculate the permissible mean time to repair and if the system as a mean of the time intervals between corrective maintenance actions of 900 hrs and the sum of the mean corrective maintenance time intervals including supply downtime and administrative down time of 10 hrs Determine the operational availability of the system1. The work-study engineer carries out the work sampling study for 120 hours. The following observations were made for a machine shop: Total number of observations 7000 No. of Idle activities 1200 Ratio between manual to machine elements 3 : 1 Average rating factor 120% Total number of jobs produced during study 800 units Rest and personal allowances 17% Compute the standard time for the job.
- A work measurement analyst at the Dorben Company took 10 observations of a high-production job. He rated the performance of each cycle and then calculated the average normal time for each item. The item with the largest dispersion had a mean of 0.30 minutes and a standard deviation of 0.03 minutes. If it is desired to have sample data within ±5% of the actual data, how many observations should the time study analyst take of this operation?Bottles for room spray are supposed to weigh exactly 16 oz. Inspectors want to develop process control charts. They take o7 boxes of five bottles each and weigh them. They obtain the following data. The mean weights of each of the 07 samples are 14.6,16.5,18.1,13.2,16,15.9, and 14.8 respectively. Likewise, the range values for the each of 07 samples are o.7,0.5, 0.4,0.2,0.4,0.5, and o.9 respectively. Ebr the X-bar charts and R-charts, the Parameters, A2, D3 and D4 are respectively.How do expectations about future economic conditions influence the speed of adjustment in the error correction model (ECM)? Are there any other factors that might affect the speed of adjustment?
- 1.Calculate Mean ,Median ,standard deviation and variance for measurement sets A, B and C SET A :398 ,420, 394, 416, 404, 408 ,400, 420 ,396, 413 ,430. • SET B:409 406 402 407 405 404 407 404 407 407 408 SET C:409 406 402 407 405 404 407 404 407 407 408 406 410 406 405 408 406 409 406 405 409 406 407outline the foundamental difference between errors that can be largely eliminateed and errors that can not be eliminatedIn a continuous review inventory system, the lead time for doorknobs is 5 weeks. The standard deviation of demand during thelead time is 85 units. The desired cycle-service level is 99 per-cent. The supplier of door knobs streamlined its operations andnow quotes a one-week lead time. How much can safety stockbe reduced without reducing the 99 percent cycle-service level?
- Four trucks arrive at construction site with arrival rate of 8/hour and service rate of 16/hour. Approximately what is production index? a. 0.25 b. 0.10 c. 0.75 d. 0.90Explain the five non- destructive techniques normally used for predictive maintenance (1). vibration monitoring (2). pressure parameter monitoring (3). thermography (4). tribology (5). visual inspection.Do the two analytical methods provide results that are significantly different at the 95% confidence interval? Justify fully, showing all calculations, logic etc