Unit 6 - Gantt Charts & Crashing Cartes | Quizlet

What are Gantt Charts?

A chart that plans & schedules projects based on their time scale - the activities/resources go down & the time goes across

What do Gantt Charts help us see? (1)

Which activities should be happening at a particular time

What do Gantt Charts help us see? (2)

Which (human) resources are being used at a particular time

How do we find the times of the activities to plot on Gantt charts?

They go from the Earliest Starting Time (EST) to the Earliest Finishing Time (EFT) from Network Diagrams. You then need to draw lines for the float times

What do you do if there is just a table & not a Network Diagram for the question asked?

You must draw a Network Diagram to know the EST's, EFT's & float times

What must you not do on a Gantt Chart during your assessment?

Resize the cells - so if you can't fit the name of the resources in the boxes, initalise them & create a key somewhere alongside the table.

How do we plot activities on Gantt charts?

Highlight the cells from the EFT to the LFT, then click 'Borders', make sure it is bold, then click 'Outside borders'. Draw a box around the outside borders for the duration of the tasks (the top boxes) (by duration

How do we plot the duration (how do we draw the box) on Gantt Charts

Start from the end of the starting cell (not covering the full cell), then to the end of the last cell (covering the full cell)

How do we draw lines for the float time?

Click the first cell for the float time, put a speech mark ('), then some lines (-) until the cell is full. Drag this cell until the last cell for the float time

How do we know that activities are critical activities?

They have no float time - there are no lines coming off their boxes

What is an Activity Gantt Chart?

A Gantt chart that plots the activities in consecutive order, showing their timeframes & float times

How do we create the table for an Activity Gantt Chart?

Put all the time numbers (whether it be days, weeks etc) across the top in consecutive order, then all the task letters down the left-hand side, leaving a blank row between each one. Write 'Activity' in the top left corner

What do you write in the boxes on an Activity Gantt Chart?

The names of the resource(s) used for this activity

What is a Resource Gantt Chart?

A Gantt chart that plots the activities based on the resource used

What do Resource Gantt Charts show us?

How resources are allocated to activities & when they are needed

How do we create the table for a Resource Gantt Chart?

Put all the time numbers (whether it be days, weeks etc) across the top in consecutive order, then all the resources down the left-hand side (some resources have multiple, so make sure you give an extra row for these & always make sure you leave a space between the last task for each resource & the first task for the next resource). Write 'Resource' in the top left corner.

What do you write in the boxes of a Resource Gantt Chart?

The activity number - there may be multiple boxes for an activity if there are multiple resources used for it

What can you do with resources for resource management? (1)

You should first check to see if any of the conflicting activities have a float. If so, you may be able to move that activity so that the conflict no longer occurs

What can you do with resources for resource management? (2)

If that is not possible, it may be possible to resolve the issue by crashing an activity

What can you do with resources for resource management? (3)

You can give the activity to someone else provided they have the necessary skills. Be careful with this one in the assignment as I have stopped you doing this in some cases by saying certain resources need to retain all activities assigned to them

How to change the times of a task when it has float time

Simply move its activity along the line until the task is in a convenient place. Make sure you draw the float line to cover the duration of the float time

How to change the times of a task when it doesn't have float time (1)

Crash the task - reduce its days, then add on to the price

How to calculate the number of crash duration available for an activity

Normal duration - Total crashed duration available

How to calculate the total crash cost per duration for an activity

(Cost after crashing - Normal cost) / (Normal duration - Duration after crashing)

How to calculate the new cost for an activity (from crashing)

Normal cost + Total crash cost

How to change the times of a task when it doesn't have float time (2)

Delay the entire project

How to delay the entire project

Move the activites that needs moving, then move all activities that come after those by the same amount of cells that you moved the critical activity (this will add on if you move multiple, after each one has been moved)

When can you not delay the project?

When the project has to completed in a certain time - in this case, you would have to resort to crashing

How would delaying the project affect the costs?

Running costs, latent penalties etc would increase.