---
title: "Bar chart advantages and limitations"
subject: "Project Engineering"
chapter: 3
key: "semester_7/project_engineering:bar-chart-advantages-limitations"
source: https://www.bctengineer.com/q/semester_7/project_engineering/bar-chart-advantages-limitations
site: BCT Engineering
---

# Bar chart advantages and limitations

Project Engineering · Chapter 3: Project Planning and Scheduling

- Asked in: 2070 Chaitra, 8 marks; 2075 Asoj, 4 marks (asked 2 times)
- Video: [Bar Chart Explained: History • Advantages • Limitations • Examples](https://www.youtube.com/watch?v=Fbx0YAZwiqc) — Taslim Alitha
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_7/project_engineering/bar-chart-advantages-limitations
- Whole chapter: https://www.bctengineer.com/md/semester_7/project_engineering/chapter-3

## Question

Explain the bar chart with its advantages and limitations.

## Short answer

A bar chart (Gantt chart) displays activities as horizontal bars over a time scale, showing schedule and progress simply. Advantages: easy to understand, good for small projects and reporting. Limitations: does not show dependencies, critical path or float, and is hard to update for large projects.

## Answer

A **bar chart (Gantt chart)** is a graphical schedule in which activities are listed down the left side and time is shown across the top; each activity is a horizontal bar whose start, length and end show its start date, duration and finish date.

```text
Activity   W1 W2 W3 W4 W5 W6 W7 W8
Survey     ####
Design        ######
Procure             ####
Build                  ##########
Test                            ####
```

Progress is shown by shading the completed part of each bar and a vertical "today" line.

#### Advantages
- Simple to prepare, read and understand, even for non-technical people.
- Shows the schedule and progress at a glance.
- Good for communication, reporting and small projects.
- Easily used for resource and cash-flow planning below the chart.
- Low cost; needs little training.

#### Limitations
- Does not show the dependency (logical relation) between activities clearly.
- Does not show the critical path or float, so priorities are unclear.
- Hard to update when changes occur; poor for large, complex projects.
- Gives no probability or uncertainty of time.
- Not suitable for trade-off analysis of time and cost.
- Result depends on the planner's judgement.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. In a bar chart, activities and time are shown:
   A. Activities on left, time across the top, each activity a horizontal bar
   B. Activities as nodes
   C. Time vertical
   D. Events as circles
   Answer: A. Bar length shows duration. (Key point: Layout)

2. A key advantage is:
   A. Shows critical path
   B. Simple to prepare and read at a glance
   C. Shows probability
   D. Shows float
   Answer: B. Simplicity and quick view of progress. (Key point: Advantage)

3. A main limitation:
   A. Does not clearly show dependencies between activities
   B. Too complex
   C. Needs costly software
   D. Shows critical path
   Answer: A. It does not show logical relations, critical path or float. (Key point: Limitation)

4. Bar charts are poor for:
   A. Small projects
   B. Large complex projects hard to update
   C. Communication
   D. Progress reporting
   Answer: B. They are hard to update and poor for large complex projects. (Key point: Suitability)

## Related in Project Engineering

- [Planning need, tools, bar chart limitations](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Aplanning-necessary-tools-bar-chart-limits) — Project Engineering, chapter 3
- [Planning in dynamic environment; linked bar chart](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Aplanning-necessary-dynamic-linked-bar) — Project Engineering, chapter 3
- [Planning, scheduling; linked bar chart](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Aplanning-scheduling-linked-bar-chart) — Project Engineering, chapter 3
- [When to use bar chart, CPM, PERT](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Abar-chart-cpm-pert-situations) — Project Engineering, chapter 3
- [Gantt, link bar chart, milestone chart](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Agantt-linked-bar-milestone-chart) — Project Engineering, chapter 3
- [Bar chart of irrigation project with milestones](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Abar-chart-irrigation-milestones) — Project Engineering, chapter 3

## Related in other subjects

- [Bar chart vs CPM/PERT as planning tool](https://www.bctengineer.com/question.md?key=semester_8%2Fconstruction_management%3Aplanning-tool-choice) — Construction Management, chapter 2, asked 3×
- [Chart vs table; bar vs pie graph](https://www.bctengineer.com/question.md?key=semester_5%2Fcommunication_english%3Adifferences-chart-table-bar-pie) — Communication English, chapter 4
- [Gantt chart for loading and scheduling](https://www.bctengineer.com/question.md?key=semester_6%2Findustrial_engineering_and_management%3Agantt-chart-loading-and-progress) — Industrial Engineering and Management, chapter 3