OPS exam 1

A​ contractor's project being analyzed by PERT has an estimated time for the critical path of 120 days. The sum of all activity variances is​ 81; the sum of variances along the critical path is 64. What is the probability that the project will take 130 or more days to​ complete?

0.1057

An activity on a PERT network has these time​ estimates: optimistic​ = 2, most likely​ = 5, and pessimistic​ = 10. What is its expected activity​ time?

5.33

The difference between AON and AOA networks is​ that:

A. nodes consume no resources or time in AOA networks. B. nodes designate activities in​ AON, while arrows designate activities in AOA. C. both are acceptable in​ practice; however, Microsoft Project uses AON. D. AOA networks sometimes require dummy activities. E. ALL OF THE ABOVE ARE CORRECT

Which of the following statements regarding CPM is​ true?

All activities on the critical path have their LS equal to the maximum EF of all immediate predecessors.

Which of the following is an example of competing on quick​ response?

A​ firm's products are introduced into the market faster than its​ competitors' products.

The​ ________ distribution is used by PERT analysis to calculate expected activity times and variances.

Beta

Which of the following represents the FIRST step to crash a​ project?

Compute the crash cost per week for each activity in the network.

Which of the following statements regarding CPM networks is​ true?

If a specific project has multiple critical​ paths, all of them will have the same duration.

Which of the following activities are NOT part of project​ scheduling?

Make sure all necessary activities are finished in proper sequence and on time.

Which of the following statements regarding critical paths is​ true?

On a specific​ project, there can be multiple critical​ paths, all with exactly the same duration.

The main difference between PERT and CPM is​ that:

PERT employs three time estimates for each activity.

Which of the following is NOT a characteristic of services?

Standardized product

Which of the following is an advantage of PERT and​ CPM?

Straightforward concept and not mathematically complex.

A simple CPM network has three​ activities, A,​ B, and C. A is an immediate predecessor of B and of C. B is an immediate predecessor of C. The activity durations are Aequals=​4, Bequals=​3, Cequals=8.

The critical path is​ A-B-C, duration 15.

Which of the following statements concerning CPM activities is​ false?

The late finish of an activity is the earliest late start of all preceding activities.

Which of the following statements regarding PERT times is​ true?

The optimistic time estimate is an estimate of the minimum time an activity will require.

pessimistic time

The time an activity will take assuming very unfavorable conditions​ is:

Which of the following statements is an assumption PERT makes regarding the probability of finishing the project on​ time?

Total project completion times follow a normal probability distribution.

Which of the following statements best characterizes delivery​ reliability?

a company that always delivers at the promised time

Dummy activities

are used when two activities have identical starting and ending events.

Which of the following activities at a commercial bank is NOT an operations​ activity?

auditing

The ability of an organization to produce goods or services that have some uniqueness in their characteristics​ is:

competing on differentiation.

Which of the following international operations strategies involves a high degree of​ centralization?

global

Which operations function at a manufacturing facility strives for the efficient use of​ machines, space, and​ personnel?

industrial engineering

The critical path of a network is the

longest time path through the network.

Which of the following is NOT one of the factors that fosters specialization and worldwide supply​ chains?

marketing

The most realistic estimate of the time required to complete an activity is referred to as​ what?

most likely time

Which of the following international operations strategies uses decentralized authority with substantial autonomy at each​ business?

multidomestic

Which of the following is used for computations in​ CPM?

normal time

What is the practice of transferring a​ firm's activities that have traditionally been internal to external​ suppliers?

outsourcing

Among the​ following, critical path and slack time analysis MOST help

pinpoint activities that need to be closely watched

Gantt charts are

planning charts used to schedule resources and allocate time.

Which of these is NOT an advantage of​ outsourcing?

potential creation of future competition

The creation of goods and services is referred to​ as:

production.

Which of the following is NOT considered to be one of the three primary functions that all organizations​ perform?

research and development

Which of the following activities at an airline is NOT an operations​ activity?

sales

PERT analysis computes the variance of the total project completion time as

the sum of the variances of all activities on the critical path.

Which of the following is an example of a​ "hidden" production​ function?

transplanting a liver

The three phases involved in the management of large projects are

​planning, scheduling, and controlling.