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Leaving Cert Technology: Project planning & Gantt charts

How often Project planning & Gantt charts comes up on the Technology papers, every year it was asked, and questions to try.

HL Asked on 7 of the last 9 Higher Level papers, most recently in 2025. most years

OL Asked on 8 of the last 9 Ordinary Level papers, most recently in 2025. most years

Project planning & Gantt charts, Higher Level(8 marks)

Quick ones on Project planning & Gantt charts.

(a)On a Gantt chart, what does the length of each bar show?
  1. How much the task costs
  2. How long the task takes
  3. How many people are needed
(b)What is the critical path in a project?
  1. The tasks that can safely be skipped
  2. The shortest chain of tasks
  3. The longest chain of dependent tasks
(c)A task's earliest start is day 4 and its latest start is day 7. What is its float?
  1. 3 days
  2. 0 days
  3. 11 days
Show the answers

(a) How long the task takes

(b) The longest chain of dependent tasks

(c) 3 days

Your turn: Higher Level questions on Project planning & Gantt charts.

Higher Level

Asked on 7 of the last 9 Higher Level papers, most recently in 2025. most years

Every paper, year by year

YearWhere it came up
2025A11
2024A6
2023Not asked
2022A7
2021A5
2019A5
2018Not asked
2017B3d
2016B3d

Links open the State Examinations Commission’s paper for that year.

Ordinary Level

Asked on 8 of the last 9 Ordinary Level papers, most recently in 2025. most years

Every paper, year by year

YearWhere it came up
2025B3c
2024B3d
2023B3d
2022A8
2021A6
2019Not asked
2018A6
2017A8
2016A5

Links open the State Examinations Commission’s paper for that year.

More Project planning & Gantt charts questions

Project planning & Gantt charts, 2 marks

What does a Gantt chart show?

  1. Material costs as a pie chart
  2. The forces acting on a structure
  3. Project tasks as bars against time
Show the answer

Project tasks as bars against time

Each task is a horizontal bar whose length shows its duration. You can see what happens when, which tasks overlap and whether the project is on schedule.

Project planning & Gantt charts, 3 marks

Task A takes 3 weeks. Task B takes 2 weeks and can only start when A ends. How long do both take?

  1. 6 weeks
  2. 5 weeks
  3. 3 weeks
Show the answer

5 weeks

B depends on A, so they run one after the other: 3 + 2 = 5 weeks. Tasks that do not depend on each other can overlap and shorten a project.

Project planning & Gantt charts, 3 marks

Why break a project into smaller tasks before starting?

  1. To plan and track progress more easily
  2. To make the project take longer
  3. To avoid setting any deadlines
Show the answer

To plan and track progress more easily

Each small task can be given a time, a person and resources. This makes it easier to schedule, spot delays early and meet the deadline.

Other Technology topics

All of Leaving Cert Technology