Questions without answers in Production, Planning and Control

Four jobs are on order in a factory. As on day $20$ of the production calendar, the corresponding due date and work remaining to complete these jobs (in days) are given i...

​​​​​A set of jobs $\text{U, V, W, X, Y, Z}$ arrive at time $t=0$ to a production line consisting of two workstations in series. Each job must be processed by both workst...

Match the additive manufacturing technique in Column $\text{I}$ with its corresponding input material in Column $\text{II}$. Additive manufacturing technique (Column $\t...

A factory produces $m (i= 1,2,\cdots, m)$ products, each of which requires processing on $n(j = 1,2,\cdots, n)$ workstations. Let $a_{ij}$ be the amount of processing ti...

The demand and forecast of an item for five months are given in the table.$$\begin{array}{|cl|cI|cI|}\hline&\textbf{Month} & \textbf{Demand} & \textbf{Forecast} \\ \hline...

The resistance spot welding of two $\text{1.55 mm}$ thick metal sheets is performed using welding current of $\text{10000 A}$ for $\text{0.25 s}$. The contact resistance ...

The time series forecasting method that gives equal weightage to each of the $m$ most recent observations isMoving average methodExponential smoothing with linear trendTr...

Sales data of a product is given in the following table:$\begin{array}{|l|l|l|l|l|l|} \hline \textbf{Month} & \text{January} & \text{February} & \text{March} & \text{Apri...

In simple exponential smoothing forecasting, to give higher weightage to recent demand information, the smoothing constant must be close to$-1$$\text{zero}$$0.5$$1.0$