Dark Mode

Recent questions tagged operations-research

0 answers

0 votes

GATE2020-ME-1: 13
In the Critical Path Method $(CPM)$, the cost-time slope of an activity is given by $\dfrac{\text{Crash Cost – Normal Cost}}{\text{Crash Time}} \\$ $\dfrac{\text{Normal Cost}}{\text{Crash Time – Normal Time}} \\$ $\dfrac{\text{Crash Cost}}{\text{Crash Time – Normal Time}} \\ $ $\dfrac{\text{Crash Cost – Normal Cost}}{\text{Normal Time – Crash Time}}$

go_editor asked in Operations Research Feb 19, 2020

5.0k points

1 answer

0 votes

GATE2020-ME-1: 23
A company is hiring to fill four managerial vacancies. The candidates are five men and three women. If every candidate is equally likely to be chosen then the probability that at least one woman will be selected is _______(round off to $2$ decimal places).

go_editor asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2020

5.0k points

0 answers

0 votes

GATE2020-ME-1: 33
For an assembly line, the production rate was $4$ pieces per hour and the average processing time was $60$ minutes. The $\text{WIP}$ inventory was calculated. Now, the production rate is kept the same, and the average processing time is brought down by $30$ percent. As ... , the $\text{WIP}$ inventory decreases by $25\%$ increases by $25\%$ decreases by $30\%$ increases by $30\%$

go_editor asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2020

5.0k points

0 answers

0 votes

GATE2020-ME-1: 47
Two business owners Shveta and Ashok run their business in two different states. Each of them, independent of the other, produces two products $A$ and $B$, sells them at $Rs.\:2,000$ per kg and $Rs.\:3,000$ per kg, respectively, and uses ... value of the difference in daily (optimal) revenue of Shveta and Ashok is _________ thousand Rupees (round off to $2$ decimal places).

go_editor asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2020

5.0k points

0 answers

0 votes

GATE2020-ME-1: 48
$\textbf{Consider two cases as below.}$ $\textbf{Case 1:}$ A company buys $1000$ pieces per year of a certain part from vendor $'X'.$ The changeover time is $2$ hours and the price is $Rs.\: 10$ per piece. The holding cost rate per part is $10\%$ ... reduction in the annual cost of $\text{Case 2}$, as compared to $\text{Case 1}$ is __________ (round off to $2$ decimal places).

go_editor asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2020

5.0k points

0 answers

0 votes

GATE2019 ME-2: 35
The activities of a project, their duration and the precedence relationships are given in the table. For example, in a precedence relationship $ X<Y,Z $ means that $X$ is predecessor of activities $Y$ and $Z$ ... $17$ $21$ $23$ $25$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 9, 2019

by Arjun

27.5k points

0 answers

0 votes

GATE2019 ME-1: 17
The table presents the demand of a product. By simple three-months moving average method, the demand-forecast of the product for the month of September is ... $490$ $510$ $530$ $536.67$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 9, 2019

by Arjun

27.5k points

0 answers

0 votes

GATE2017 ME-2: 49
A project starts with activity $A$ and ends with activity $F$ ... The minimum project completion time (in days) is _________.

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 27, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2017 ME-2: 48
A product made in two factories, $P$ and $Q$, is transported to two destinations, $R$ and $S$ ... the minimum) total transportation cost is $Y$ (in Rupees), then $(X-Y)$, in Rupees, is $0$ $15$ $35$ $105$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 27, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2017 ME-1: 52
Following data refers to the jobs $(P, Q, R, S)$ which have arrived at a machine for scheduling. The shortest possible average flow time is __________ days. $\begin{array}{|l|l|} \hline \text{Job} & \text{Processing Time (days)} \\ \hline P & 15 \\ \hline Q & 9 \\ \hline R & 22 \\ \hline S & 12 \\ \hline \end{array}$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 27, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2017 ME-1: 51
Two models, $P$ and $Q$, of a product, earn profits of Rs.$100$ and Rs. $80$ per piece, respectively. Production times for $P$ and $Q$ are $5$ hours and $3$ hours, respectively, while the total production time available is $150$ hours. For a total batch size of $40$, to maximise profit, the number of units of $P$ to be produced is ________.

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 27, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-3-55
A firm uses a turning center, a milling center and a grinding machine to produce two parts. The table below provides the machining time required for each part and the maximum machining time available on each machine. The profit per unit on parts $I$ and $II$ are $Rs. 40$ ... minutes) I II Turning machine $12$ $6$ $6000$ Milling center $4$ $10$ $4000$ Grinding Machine $2$ $3$ $1800$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-3-54
The demand for a two-wheeler was $900$ units and $1030$ units in April $2015$ and May $2015$, respectively. The forecast for the month of April $2015$ was $850$ units. Considering a smoothing constant of $0.6$, the forecast for the month of June $2015$ is $850$ units $927$ units $965$ units $970$ units

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-3-25
In PERT chart, the activity time distribution is Normal Binomial Poisson Beta

Arjun asked in Operations Research Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-2-55
A project consists of $14$ activities, $A$ to $N$. The duration of these activities (in days) are shown in brackets on the network diagram. The latest finish time (in days) for node $10$ is __________

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-2-54
A food processing company uses $25,000 \:kg$ ... on an annual basis is $20\%$ of the purchase price of the corn flour per $kg$. The optimal order quantity (in $kg$) is _____________

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-2-20
In a single-channel queuing model, the customer arrival rate is $12$ per hour and the serving rate is $24$ per hour. The expected time that a customer is in queue is _______ minutes.

Arjun asked in Operations Research Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2016-1-54
The annual demand for an item is $10,000$ units. The unit cost is $Rs$. $100$ and inventory carrying charges are $14.4\%$ of the unit cost per annum. The cost of one procurement is $Rs$. $2000$. The time between two consecutive orders to meet the above demand is _______ month($s$).

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2015-3-8
In the notation $(a/b/c) : (d/e/f)$ for summarizing the characteristics of queuing situation, the letters $‘b’$ and $‘d’$ stand respectively for service time distribution and queue discipline number of servers and size of calling source number of servers and queue discipline service time distribution and maximum number allowed in system

Arjun asked in Operations Research Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2015-1-34
For a canteen, the actual demand for disposable cups was $500$ units in January and $600$ units in February. The forecast for the month of January was $400$ units. The forecast for the month of March considering smoothing coefficient as $0.75$ is ________

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE2015-1-33
Following data refers to the activities of a project, where, node $1$ refers to the start and node $5$ ... (CP) in the network is $1$-$2$-$3$-$5$ $1$-$4$-$3$-$5$ $1$-$2$-$3$-$4$-$5$ $1$-$4$-$5$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE Mechanical 2014 Set 4 | Question: 51
At a work station, $5$ jobs arrive every minute. The mean time spent on each job in the work station is $1/8$ minute. The mean steady state number of jobs in the system is _______

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE Mechanical 2014 Set 4 | Question: 50
The precedence relations and duration (in days) of activities of a project network are given in the table. The total float (in days) of activities $e$ and $f$ ... $0$ and $4$ $1$ and $4$ $2$ and $3$ $3$ and $1$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE Mechanical 2014 Set 4 | Question: 19
Demand during lead time with associated probabilities is shown below: Expected demand during lead time is _______

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE Mechanical 2014 Set 4 | Question: 18
The total number of decision variables in the objective function of an assignment problem of size $n × n$ ($n$ jobs and $n$ machines) is $n^2$ $2n$ $2n-1$ $n$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE Mechanical 2014 Set 3 | Question: 21
A minimal spanning tree in network flow models involves all the nodes with cycle/loop allowed all the nodes with cycle/loop not allowed shortest path between start and end nodes all the nodes with directed arcs

Arjun asked in Operations Research Feb 19, 2017

by Arjun

27.5k points

0 answers

0 votes

GATE Mechanical 2014 Set 3 | Question: 19
The actual sales of a product in different months of a particular year are given below: ... $4$-month moving average method, for the month of February is _______

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

by Arjun

27.5k points

To see more, click for the full list of questions or popular tags.