Refer to Exercise 6.7, in which we found the sampling distribution of the sample median. Is the…

Refer to Exercise 6.7, in which we found the sampling distribution of the sample median. Is the median an unbiased estimator of the population mean μ?

Exercise 6.7

Refer to Exercise 6.5. Assume that a random sample of n = 2 measurements is randomly selected from the population.

a. List the different values that the sample median M may assume, and find the probability of each. Then give the sampling distribution of the sample median.

b. Construct a probability histogram for the sampling distribution of the sample median, and compare it with the probability histogram for the sample mean (Exercise 6.5, part b).

Exercise 6.5

Consider the population described by the probability distribution shown here:

The random variable x is observed twice. If these observations are independent, verify that the different samples of size 2 and their probabilities are as follows:

a. Find the sampling distribution of the sample mean .

b. Construct a probability histogram for the sampling distribution of .

c. What is the probability that  is 4.5 or larger?

d. Would you expect to observe a value of  equal to 4.5 or larger? Explain.

The sleep disorder characterized by either difficulty falling asleep or frequently waking is known..

The sleep disorder characterized by either difficulty falling asleep or frequently waking is known as a. sleep apnea. b. insomnia. c. somnambulism. d. REM rebound.

Which of these concerns does NOT belong in the assessment of team performance in a project final rep 1 answer below »

Which of these concerns does NOT belong in the assessment of team performance in a project final report?a. Does the project manager have the ability to evaluate worker performance? b. Were the stakeholder’s concerns addressed? c. How were our project team members trained for their duties? d. Were the best people in the organization selected to work on this project?

Big yellow school buses. They’re a common sight at the beginning and end of the school day in many..

Big yellow school buses. They’re a common sight at the beginning and end of the school day in many communities. One company that manufactures those school buses is Blue Bird Corporation. School buses are a product where quality is paramount. After all, that product is carrying precious cargo! However, achieving an organizational culture that’s dedicated to quality and to efficient manufacturing isn’t an easy thing to do.

Chris Peterson at DSS Consulting Deborah Ancona and David Caldwell Late Thursday afternoon, Chris Pe

Chris Peterson at DSS Consulting

Deborah Ancona and David Caldwell

Late Thursday afternoon, Chris Peterson was reflecting on the meeting she would have tomorrow

with her boss, Meg Cooke. The purpose of the meeting was to give Meg an update on the status of the

integrated budget and planning system her team had been working on over the last six months and

plans for the team to begin marketing this system and other new DSS consulting services to clients.

Overall, Chris was quite pleased with the work her team had done. The team had been formed as part

of a strategic change, including a somewhat controversial re-organization at DSS. The changes and

new structure had created dissatisfaction and a fair amount of anxiety among many of DSS’s

consultants, but Chris felt her team had overcome their concerns to become a very effective group.

They had worked together well, avoided the conflicts that often plague these kinds of teams, and

generally maintained a high level of motivation and satisfaction. Most of all, Chris was proud of the

work her team had done. They had created a budget and planning system that the team believed

would be embraced by DSS’s clients. The team had not gotten much support from other groups at

DSS in developing the system, so team members had done much of the technical work on their own

that would have normally been done by support people in the company. Despite this, Chris was very

pleased with the system and looked forward to sharing her team’s accomplishments with Meg.

DSS Consulting

DSS Consulting was formed in 1997 to provide administrative support to small school districts

primarily in the mid-west and mountain west. The company was founded by three retired school

district administrators to help small school districts that had limited staff deal with difficult and

somewhat specialized administrative problems, such as negotiating labor agreements or setting up

procurement systems.

During the late 1990s, DSS grew rapidly as small school districts faced more complex challenges and

pressures to cut costs, particularly in administration. In response to this growth, DSS organized itself

into four practice departments—Procurement and Systems, Information Technology, Contract

Negotiation, and Facilities Planning—to deal with different types of engagements. Business came

primarily through contacts the five founders had developed. Once DSS was engaged, the project

would be referred to the head of the appropriate practice group who would assign consultants to the

project.

By 2005, a number of changes had begun to affect DSS. First, the founders were cutting back their

involvement in the company. As a result, management decisions were being passed on to new leaders,

including people hired from other consulting companies. In addition, since much of DSS’s business

was generated through contacts established by the founders, their reduced involvement was creating a

need for new marketing strategies. Second, the types of problems for which districts were looking for

help were becoming more diverse and often didn’t fit clearly into a specific practice area. The

increasing complexities districts were facing were both reducing the need for the relatively

straightforward projects DSS had been working on and creating demands for new types of services.

Finally, state standards for school districts were diverging from one another, so that certain issues

were more important in one region than in another. All of these changes led to stagnation in revenue

growth for DSS.

Because of these changes, the founders decided that a shift in strategy would be necessary for DSS to

continue to grow and be successful. As a first step, they promoted Meg Cooke to the position of Chief

Operating Officer. Meg had joined DSS in the Contract Negotiation group about four years earlier

after spending time with a larger east coast firm. Two years after joining DSS, she had been promoted

to head the Contract Negotiation group. The founders and Meg had concluded that if DSS was to

continue to be successful, it would need to expand beyond its traditional customer base of small

districts and offer services to larger districts much more than it had in the past. They felt that

accomplishing this would require developing new services and reorganizing into a more crossfunctional,

customer-focused organization. A major part of the strategic change involved reorganizing

DSS from a purely practice-oriented functional structure to a hybrid structure. Most of the

consultants would now be assigned to new cross-functional teams that would be responsible for

marketing and delivering services to districts within a particular geographic region. The practice

groups were maintained to provide specialized expertise to support the cross-functional teams in their

work but with many fewer staff members than in the past.

The new cross-functional teams were given two responsibilities. Over the long run, the teams were to

build relationships with the school districts in their regions and provide a full range of DSS consulting

services to those districts. The teams were also to develop new consulting offerings in response to

district needs. The expectations were that the cross-functional teams would eliminate the functional

“silos” that constrained the services DSS could provide and help DSS develop services that could be

sold to larger districts. Both these were seen as crucial steps in the plan to grow DSS.

Chris Peterson and the Southwest Region Team

Chris Peterson joined DSS in 2001. She started her career as a high school teacher in a small school

district in Iowa. When the district began to deploy personal computers, she was asked to head up the

implementation in her school. The process went so smoothly that she was asked to give up classroom

teaching and work full-time for the district in rolling out technology across all the schools. After five

years in that job she joined DSS as a consultant in the Information Technology group. She rose to the

position of project manager in the group and had been very successful in leading consulting projects.

When the decision was made to reorganize into cross-functional teams, Chris was seen as a “natural”

to lead one of the teams and was assigned to head the Southwest Region team.

Chris looked on her new assignment with a mixture of excitement and apprehension. Much of the

excitement came from the opportunity to lead a permanent team rather than coordinate individuals for

short consulting projects. Her apprehension came in large part because of some uncertainties about

how the new strategy would unfold. Chris was aware that many people were ambivalent about the

new strategy and uncertain about the necessity of the change and whether or not it was likely to be

successful. The result of this was that there was a great deal of anxiety among many consultants

about the future of DSS and their roles in the new structure. Chris also suspected that the strategy

was still evolving and might change as management got a sense of how well the new organization

was working.

One of the decisions that Meg had made about the new teams was that the team leaders ought to have

a great deal of flexibility in inviting people to join their teams. Chris welcomed this opportunity. In

thinking about who she wanted for the team, she considered two factors. First, she wanted people

who had good skills and were experienced in the DSS consulting process. Second, she felt she

needed people who would be able to work together well. She believed this would be important

because of both the nature of the work to be done and her fear that the anxiety created by the change

would boil over into dissatisfaction if people had trouble working together.

Chris gave a great deal of thought about who to ask to join the Southwest Region team. She decided

that one thing that would help the group work together smoothly would be to select people who

already had some experience in working with one another. Overall, Chris was quite happy with the

team she was able to put together. She ended up asking two consultants each from Contract

Negotiations, Procurement and Systems, and Information Technology, and one consultant from the

Facilities group to join the team, all of whom accepted. Even though the consultants had not worked

on specific projects with each other in the past, they knew one another and had a great deal in

common. Nearly all of them had worked on DSS’s annual Habitat for Humanity project and all had

started at DSS at about the same time. Many members of the group socialized with one another

outside of work. At the first group meeting Chris realized that her strategy had worked well. Two of

the consultants marveled about how nice it would be to work with people who were both very

competent and friends as well. Another consultant mentioned that he didn’t know many people at

DSS other than the members of his new team and he was really looking forward to the project. Like

most DSS consultants, members of Chris’s new team had some questions about the new strategy and

leadership; however all believed that their new team had tremendous potential.

Beginning the Work

As DSS was making the transition to the new structure, consultants continued to finish existing

projects even as they began working with their new teams. Chris believed it was very important that

her team members be located together as soon as possible even though the team would not be

working together full-time right away. She believed that co-locating the team would allow the group

to get a quick start on the major deliverable of developing new products for DSS and prevent the

group from getting distracted by some of the uncertainties created by the new structure. Chris was

able to identify some space and a plan that could bring the full team together. Since none of the other

new team managers felt as strongly about the co-location of their teams as Chris did, Meg allowed

Chris’s team to move together before the other teams did.

Once the team got settled into its new location, they quickly got to work. Chris believed that the first

issue for the team would be to share their experiences and use their collective knowledge to identify

one or more potential new products, and that her initial job would be to help the group pull together

their experiences. The group had a number of meetings over the next month discussing their

perspectives. Chris was very pleased with what happened in the meetings. The team members

seemed comfortable sharing information with one another. If a disagreement emerged, the team dealt

with it without creating animosity or substantial delay. Chris was particularly pleased when two of

the team members told her that this was one of the best groups they had ever been a part of.

Even though they were from different functional areas, the team members found that they had very

similar experiences in dealing with districts. All of them had at least one story about how they had

been delayed in a project because the people they were working with in the district were not able to

get accurate data about budgets or long term plans. What emerged from the discussions was that

small districts seemed to lack any integrated system for linking plans and budgets over time. The

superintendent of the district seemed to be the only person who knew everything that was going on

and if he or she was not available it was difficult to get timely information. The team concluded that

what small districts needed was an integrated system for planning and budgeting. Although most

large districts had the systems or the human resources to do this, the costs were prohibitive for a small

district. The team determined, therefore, that a scaled down system could provide the level of

planning small districts needed at a price they could afford. Further, this project both excited the

team and was something they felt they could do well.

Planning the New Product

As members of the team began finishing the consulting projects they had been working on, they were

able to devote more time to developing specifications for the new system. The majority of the team

were now spending nearly all their time working with one another and saw less and less of the other

consultants who were not on the team. Occasionally people would bring up what other consultants

had said their teams were doing, but this seldom generated much interest and was sometimes seen as

almost a distraction to the group. At this point in time, Chris had two primary goals for the team.

First, she wanted to keep the group focused on the jobs of defining the new system and determining

exactly how DSS consultants would use it. Second, she wanted to help the group avoid distractions

and continue to build cohesion.

In addition to working with the team, Chris tried to deal with people outside the group. She had

developed friendships with two superintendents in small districts and when she saw them, she took

the opportunity to describe the system her team was developing. Generally, the feedback she

received was positive and she relayed this to her team. Chris also met occasionally with Meg to

update her on the project; however these meetings were generally short. Chris observed that some of

the other team leaders spent more time meeting with Meg than she did, but she didn’t see that there

was much need for her to do so, given the progress her team was making.

Developing the Planning and Budgeting System

Once the specific design of the proposed budget and planning system was complete, Chris felt it was

time to share the work of the team with others. She took a detailed description of the program out to

a number of districts she had worked with in the past and asked for comments. She also emailed the

program description to Meg and some of the DSS functional specialists who would have to provide

some technical support in developing the consulting protocols and specifying parts of the code for

managing the data base.

The conversations with people in the districts were informative and more-or-less positive. While

generally expressing support for the new system, people in the districts raised some specific

questions. Many of the comments or questions were about how the system would deal with issues

that were unique to a district. A few questions emerged about the price of the product and how it

would differ from other products already on the market. When Chris took these comments back to

the group they tried to modify the initial design and specifications of the program to meet the

concerns that were raised. This worked well in the short run, but as more comments came in, the

group began to flounder as the team tried to adapt the design to meet many of the questions from

outsiders.

The reactions from others inside DSS were different from those in the districts. Most of the

functional specialists who received descriptions of the project simply acknowledged receiving them

but did not offer any real comments. Meg responded by asking a couple of questions and saying that

she and Chris would talk more about it later. Overall, the group was pleased with these responses; no

one had raised any objections to the program design or identified any difficulties that would slow the

project down.

As the group worked to change the project specifications in response to the comments coming in from

the districts, Chris felt that the effective process the group had developed was beginning to break

down. There were disagreements about how important various comments actually were and progress

in finalizing the specifications seemed to slow. Team members began to voice more concerns than

they had in the past about the direction DSS was going and question whether the team would be able

to accomplish its task. Chris decided that something needed to be done to get the group back on

track. She cancelled work on the next Friday and had the whole team meet at a nearby nature

preserve. After a hike, the group returned to Chris’s house for a barbeque lunch. Following lunch,

the members spent the rest of the afternoon discussing how they were performing and what they

needed to do to finish designing the project. Overall, this seemed to work quite well. When the team

got back to work on Monday, they quickly finalized the specifications and identified the steps that

would be necessary to actually develop the product and consulting protocols.

The team turned its attention to completing the project. The project had four components: a database

program provided by a third-party vendor; a program for putting information into the database

program written by an outside consulting firm; a set of forms districts would use to organize

information about schedules and budgets; and a set of instructions for consultants to use in helping

districts use the program and its results. The team split into sub-groups to work on pieces of the final

project.

Putting together the forms and developing instructions for consultants were the most challenging

parts of the project. Both of these tasks required detailed knowledge about the different types of

projects districts might undertake. Although members of the team had the knowledge and experience

to complete most of this work, they often found that they needed to draw on the specialized

knowledge of the DSS specialists in the practice groups. When a specific question came up that the

team could not answer, one member of the Southwest team would either email a question or have a

face-to-face meeting with the specialist. This worked well for simple issues but not for more

complex problems. When team members tried to get functional specialists to spend time working on

these more complex problems, they were often not given much help and were occasionally rebuffed.

Chris found that she often had to go directly to the manager of the practice area to try to get support.

Even this didn’t always work. One event typified the problem Chris was experiencing. She met with

the head of Contract Negotiation to identify the specific information about a district’s employees that

would need to be entered into the program. He told Chris that he would ask one of his specialists to

work on it with the team. When one member of Chris’s team contacted the specialist, he was told that

this project had not been built into her schedule and that she would not be able to help him until other

things got done.

When Chris learned of this she scheduled a meeting with Meg to discuss the difficulty her team was

having in getting support. From Chris’s perspective, the meeting with Meg did not go particularly

well. Meg seemed sympathetic to the difficulty Chris was having getting support and suggested that

she could keep working with the practice group managers to get the final elements of the project

completed. Chris had hoped that Meg would take more direct action. When Chris reported back to

the team, the overall reaction by team members was negative. There were a number of comments

about how decisions at DSS seemed to be more “political” under the new organization and how the

“new Meg” seemed to be playing favorites.

Finishing the Project

Despite the difficulty in getting support from others in the organization, Chris knew that the project

was close to completion and could still be a success in the market. Chris conveyed this to her team.

She reminded them that even if they were not getting the type of support they would like, they had the

experience necessary to finish the program on their own. Chris’s optimism was contagious. The

team increased their efforts and did independent research to fill in their own knowledge gaps. The

project came together quickly and within 10 days the team had a full product ready for beta testing.

A few weeks earlier, Chris had recruited a district that would be willing to serve as a test site and a

date was scheduled for the team to go into the district to demonstrate the product.

The Meeting with Meg Cooke

As Chris came into work on Friday morning, she thought back over the last few months and was quite

pleased. The group had done a terrific job of specifying and developing a new product that was ready

for a beta test. Initially her team members had doubts about the new strategy and their new roles but

they had overcome those, and some real obstacles, to finish the assignment. Chris was looking

forward to sharing this with Meg.

From Chris’s perspective, the Friday morning meeting with Meg started off very well. Chris outlined

the progress her team had made on the integrated budget and planning system. She spoke about how

she was managing the beta test for the program and of the positive comments she was getting from

the district. She also talked about how effective her team was. They worked together very well, were

cohesive, and made decisions easily and quickly. Chris also mentioned that a number of the team

members had not supported the reorganization at first but despite that had invested a great deal of

effort in making the team and project work and were now committed to the new direction for DSS. In

particular, Chris complimented the team members on their initiative in finishing the project even

when they didn’t have a great deal of help from the specialists in the practice groups.

Meg thanked Chris for all the hard work on the project and mentioned that she had heard very

positive things about Chris’s leadership from members of the Southwest Region team. Meg then

shifted the conversation and asked Chris for a report about the types of services districts in her region

might be looking for DSS to provide in the future and whether some of the other projects the DSS

regional teams were working on would be of interest to the districts. Chris responded that she had a

general idea of what the other teams had been working on but did not feel she had sufficient

information to present them to districts at this time. She went on to say that her team had focused on

their project and that the plan was for them to go out and meet with all districts in the region after the

project was in a beta test so that they would have something specific to discuss. She reassured Meg

that although she did not have a clear answer to the question right now, she would in the near future.

Meg then asked Chris how she saw the integrated budget and planning system being marketed to

large school districts given that most of them already seemed to have either systems or personnel to

do this. Chris responded that she understood the concern and that, at this point in time, large districts

might not be interested in the system in its current form. She went to say that as the system was

modified and expanded it would very likely be of interest to larger districts. After this, Chris and

Meg exchanged a few pleasantries and the meeting ended.

The Monday Morning Meeting

When Chris arrived for work on Monday morning she found that she had a message from Meg asking

if they could meet for coffee at 10:30. Chris was curious about the meeting, but quickly responded

that she would be available, and the two agreed to meet at a nearby coffee shop. After getting coffee

and talking a bit about the weekend, Meg told Chris that after reviewing her team’s project and its

potential, she had decided that DSS would not go forward with the scheduling and budgeting project.

When Chris asked for the reasons for this decision, Meg replied that the number of new products DSS

could support was limited and that teams in the other regions had not reported any interest on the part

of the districts they had worked with for this type of product. Meg also said that she was concerned

that the project would not be of interest to the large districts. Chris responded that she certainly

understood the issue about large districts but did not agree with Meg’s observation. She went on to

say that she did not understand how other regional teams could say that there would not be a demand

for the product when they did not even know what the planning and scheduling system could do.

Meg said that she appreciated Chris’s concerns but that the decision to cancel the project was final.

An awkward silence followed this last exchange. After a moment or two, Meg said that there was

one more thing left to discuss. She said that the Southwest Region Team would focus exclusively on

marketing DSS products and not be involved in product development work in the future and that there

would be some change to the composition of the team. Meg ended by asking Chris if she was

prepared to lead the group in a new direction or if she would be more comfortable and successful

returning to the IT practice group as a functional specialist.

What does a team like the one being led by Chris require from outsiders in order to succeed?

What did Chris do right in leading this team?

Why did Meg react the way she did to Chris's performance?

What could Chris have done differently in leading this team?

For the data given in Problem 16.6, use the extended bottleneck model to develop the relationship…

For the data given in Problem 16.6, use the extended bottleneck model to develop the relationship for production rate Rp and manufacturing lead time Mir each as a function of the number of parts in the system N. Plot the relationships as in Figure 16.16.

Problem 16.6

A semi—automated flexible manufacturing cell is used to produce three products. The products are made by two automated processing stations followed by an assembly station. There is also a load/unload station. Material handling between stations in the FMC is accomplished by mechanized carts chat move tote bins containing the particular components to be processed and then assembled into a given product. The carts transfer tote bins between stations. In this way, the carts are kept busy while the tote bins are queued in front of the workstations. Each tote bin remains with the product throughout processing and assembly. The details of the FMC can be summarized as follows:

The product mix fractions and station processing times for the parts are presented in the table below. The same station sequence is followed by all products: 1 →2 →3 → 4 → 1.

The average cart transfer time between stations is 4 min. Use the bottleneck model to determine: (a) What is the bottleneck station in the FMC, assuming that the material handling system is not the bottleneck? (b) At full capacity, what is the overall production rate of the system and the rate for each product? (c) What is the minimum number of carts in the material handling system required to keep up with the production workstations? (d) Compute the overall utilization of the FMC. (e) What recommendations would you make to improve the efficiency and/or reduce the cost of operating the FMC?

Phsyiological and biomechanical impacts on workplace design b Explain how biomechanical activity, ph

Phsyiological and biomechanical impacts on workplace design b Explain how biomechanical activity, physiological
activity, and anthropometric activity interact to assist in the design of a
workplace A paragraph will do

c Visit the Balans Chair web site
(http://wwwsitincomfortcom/hagbalvittashtml) Write a short paragraph
telling me what you think of their version of “sitting“

delivering bad news to removing a Band-Aid—you can do it slowly or quickly. She thinks that… 1 answer below »

delivering bad news to removing a Band-Aid—you can do it slowly or quickly. She thinks that quickly is better, particularly when companies must give bad news to employees.25 Do you agree or disagree