## Oliver 75 - 24th Question

jyotimayank
Expert
Posts: 524
Joined: Mon Mar 09, 2015 6:01 am

### Oliver 75 - 24th Question

24. A project management team is evaluating the causes that might contribute to unsatisfactory performance and quality. Which of the following statements is not true?

A. Normal process variation is attributable to random causes and sometimes also called "white noise".
B. Special causes are easier to predict and handle than random causes (also called common causes).
C. Special causes are unusual events which are difficult to foresee and often produce outliers.
D. A process can be optimized to limit the bandwidth of variations due to random causes.
Jyoti Gupta
PMP Mentor & Coach

iZenbridge Consultancy Pvt Ltd
jyotimayank
Expert
Posts: 524
Joined: Mon Mar 09, 2015 6:01 am

### Re: Oliver 75 - 24th Question

Control charts are used to show whether a repetitive process is “in control” or “out of control” .When 7 consecutive data points are presented on either side of mean, then “process is considered Out of Control” based on heuristic of Rule of Seven.
Refer to Page 238 0f PMBOK® Guide 5th Edition

For more insight of this topic refer to the following blog and video

http://www.izenbridge.com/videogallery/ ... 2-pmbok-5/

http://www.izenbridge.com/blog/control- ... lity-tool/
Jyoti Gupta
PMP Mentor & Coach

iZenbridge Consultancy Pvt Ltd
ihuseynli
Participant
Posts: 50
Joined: Mon Aug 20, 2018 7:16 am
Location: Baku, Azerbaijan

### Re: Oliver 75 - 24th Question

Hi, I passed this test recently, and also choosed B, but Oliver Lehmann wesite tell that it is wrong, correct is
A -Normal process variation is attributable to common causes that are part of the system

Br,
Ismayil Huseynli, ITIL®, OCE®, OCA®
Baku, Azerbaijan
manishpn
Expert
Posts: 2616
Joined: Sat Jan 04, 2014 3:55 pm

### Re: Oliver 75 - 24th Question

this question need a good understanding of six sigma, and I would recommend not to spend too much time on it,
but if you have time go through this link

https://www.benchmarksixsigma.com/forum ... ack-noise/
Br,
Manish P
PMP, PMI - ACP, SAFe Agilist
http://www.izenbridge.com/blog/7-effect ... ification/