Find out the quality, Mechanical Engineering

Assignment Help:

Find out the quality:

ABC industries manufacture X-band radar scanners utilized to detect speed traps. The printed circuit boards in the scanners are bough from an outside vendor. The vendor generates the boards to an AQL of 2% defectives and is eager to run a 5% risk α of having lots of this level or fewer defectives discarded. The company considers lots of 8% or more defectives (LTPD) unacceptable and wants to ensure that it shall accept such poor quality lots not more than 10% of the time (β). A large shipment has just been delivered. What values of n and c must be choose to find out the quality of this lot?

Solution

It is given in the problem that

AQL = 0.02, α = 0.05, LTPD = 0.08 and β = 0.1. We can use table 14.6 to calculate c and n.

Therefore, the appropriate sampling plan is C = 4 and n = 100. Up to four defects found in the lot, the lot shall be accepted.

Table shows several acceptance numbers C. Corresponding to the specific C values, sample size is constant.

          Table: Data for Deriving a Single Sampling Plan

(Derived from Poisson Cumulative Table with α = 0.05 and β = 0.10)

743_Acceptance Sampling.png

In the present case LTPD/AQL = 4.

If you look at the Table, ratio n p0.10 / n p0.95 is 4.06 when C = 4 which is nearby to the ratio of LTPD/AQL.

n p0.10  = 7.99

n × 0.08 = 7.99

n ≈ 100


Related Discussions:- Find out the quality

Evaluate the angle of heel, A motor cycle with rider, weight of 250 Kg., th...

A motor cycle with rider, weight of 250 Kg., the centre of Gravity of the machine and rider combined being 60 cm above from ground level when the machine is standing upright. Each

Either wheel is wobbling motorcycle problem, If Either Wheel is Wobbling ...

If Either Wheel is Wobbling Causes of Problem Remedy Excessive wheel bearing play Distorted rim Improperly

Gyroscope, what is principle of gyroscope

what is principle of gyroscope

Opportunity cost, whats the example of opportunity cost?

whats the example of opportunity cost?

Vertical vessels - vessel rigging analysis, Vertical vessels having height-...

Vertical vessels having height-to-diameter ratios greater than 8 and weighing more than 25,000 lb. (11300 kg), shall have bending stresses in the vessel shell/skirt checked, from t

Stockholm conference, define environment and explain stockholm conference

define environment and explain stockholm conference

Describe root-finding techniques, In mechanics, stress is a measure of the ...

In mechanics, stress is a measure of the internal forces acting within a deformable body. Quantitatively, it is a measure of the average force per unit area of a surface within the

MOS., WHY SHEAR STRESS IS NOT MAXIMUM AT THE NEUTRAL AXIS IN TRIANGLE...ITS...

WHY SHEAR STRESS IS NOT MAXIMUM AT THE NEUTRAL AXIS IN TRIANGLE...ITS MAX IN ALL OTHER CASES BUT Y NOT IN TRIANGLE?#

Determine the compressor work, (a) A four cylinder engine operates at 1200 ...

(a) A four cylinder engine operates at 1200 rpm gave 18.6 KW brake power, the average torque when one cylinder was cut-off was 105 N-m. Evaluate the indicated thermal efficiency if

Epicyclic Gear Box or Wilson Gear Box, an arrangement of the wilson epicycl...

an arrangement of the wilson epicyclic gearbox giving four forward and one reverse speed of shaft D for an input speed of shaft E is shown in fig .3.in 1st gear Ii is fixed.in 2 ge

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd