User Account

All Pages

Statistics, Basic Statistics

Assignment Help:
Question 1

A courier company conducted a brainstorming session amongst drivers to ascertain the reasons why it was unable to deliver items to households, always right first time. One major reason suggested by drivers during the session was "customer not at home" when the driver arrived. If there were no specific instructions from the customer, for example "leave on door step" or "leave behind garbage bins", drivers were generally reluctant to leave the item unattended. In such cases, items were returned to the company''s warehouse, the customer contacted and an alternative time arranged. For some customers, it took several attempts before an item was delivered successfully. The result was a poor customer experience and significant rework costs incurred by the company.

The company decided to measure the size of the issue, which it classified as the defect "customer not at home". It examined Monday to Friday data from 3rdAugust 2009 to 1stth October 2009 with an intention of developing a baseline from which to consider improvement. It sampled its Monday to Friday deliveries, each day taking 500 random delivery attempts and recording whether the driver was unable to deliver due to "customer not at home". See the data file. There was no reason to believe that Monday was systematically better or worse than Tuesday or Tuesday was systematically better or worse than Wednesday etc.

(a) Summarise the baseline performance of deliveries with respect to the defect "customer not at home". Do not remove any data.

Group Assignment (2010)

Having established the baseline, the company set about asking the courier drivers for improvement suggestions. It was agreed that a solution called "Double SMS" be trialled.

The customer would be sent an SMS advising on possible delivery time windows soon after the item was received in the company''s warehouse. The customer would then select a preferred delivery window. A few hours before the scheduled delivery, a second SMS would be sent, asking the customer for a confirmation that he/she would be at home during the agreed delivery time window. If the customer advised he/she would not be at home, the customer would be offered an alternative delivery window.

Trials with the "Double SMS" solution began on 2nd October and continued until 11th November when enough data points had been gathered to consider the solution successful and sustainable.

(b) Summarise the performance of the new process. Do not remove any data.

(c) Discuss and demonstrate using a single control chart the extent of the improvement that has occurred from the old process to the new process. Do not remove any data.

(d) Recommend what next steps you would take with the new process. You are not required to undertake these steps.

Related Discussions:- Statistics

Determine ytm price formula, YTM can be determined using the price formula...

YTM can be determined using the price formula of a bond. Part a The present value (price) formula for a zero coupon bond is: PV = F/(1+i) n Plugging in the given inf

Level of significance, Twenty years ago, entering male high school students...

Twenty years ago, entering male high school students of Central High could do an average of 24 pushups in 60 seconds. To see whether this remains true today, a random sample of 36

Mean Deviation, Mean Deviation The two methods of dispersion discussed abo...

Mean Deviation The two methods of dispersion discussed above namely range and quartile deviation are not measure of dispersion in the strict sense of te term because they do not s

Projectile, a ball is projected so as to attain a maximum range. Find the m...

a ball is projected so as to attain a maximum range. Find the maximum height attained if initial velocity is u

Sale of an asset on account of depreciation, Write a short note on Sale of ...

Write a short note on Sale of An Asset on account of Depreciation. Ans. An asset can be sold anytime before or after its useful life estimated time, in case the asset is sold more

Hypothesis testing, After analyzing the data the researcher has to test ten...

After analyzing the data the researcher has to test ten hypotheses various tests such as chi square test t test have been developed by statisticians for the purpose. The hypotheses

Reproduction rates, Reproduction rates: if the majority of births are thos...

Reproduction rates: if the majority of births are those of boys the population is bound to decrease while the reverse will be the case if the majority of births are girls. Similar

Probability mass function, how p(x)=hyper geometric distribution is probabi...

how p(x)=hyper geometric distribution is probability mass function

Calculate the p-value and test statistic, 1.  This assignment is important...

1.  This assignment is important in providing feedback and helping to establish competency in essential skills. 2.  Answer all the questions. The questions are not of equal weig

Sequence networks , A group of identical synchronous motors is connected th...

A group of identical synchronous motors is connected through a transformer to a 4.16-kV bus at a remote location from the generating plants of a power system. The motors are rated

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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