Timeline charts in Google Sheets - Dashboard Guide

Dashboard Mode - Timeline charts

Dashboard Goal

Track project tasks over time to see when each task starts and ends. This helps manage deadlines and workload.

Sample Data

Task	Start Date	End Date	Duration (days)
Design	2024-06-01	2024-06-05	=C2-B2+1
Development	2024-06-06	2024-06-15	=C3-B3+1
Testing	2024-06-16	2024-06-20	=C4-B4+1
Deployment	2024-06-21	2024-06-22	=C5-B5+1
Review	2024-06-23	2024-06-25	=C6-B6+1

Dashboard Components

• KPI Card: Total Project Duration
  Formula: =MAX(C2:C6)-MIN(B2:B6)+1
  Shows total days from first start to last end date.
• Timeline Chart: Gantt-style bar chart showing tasks over dates.
  Uses stacked bar chart with:
  - Start offset: =B2 - MIN(B$2:B$6)
  - Duration: =C2 - B2 + 1
  Chart data range includes Task names, Start offset, and Duration columns.
  This visually shows when each task happens on the timeline.
• Task Table: Shows Task, Start Date, End Date, Duration columns for detail.

Dashboard Layout

+----------------------+-----------------------+
| Total Project Days    | Timeline Chart        |
| (KPI Card)           | (Gantt Bar Chart)     |
+----------------------+-----------------------+
| Task Table (Details)                          |
+----------------------------------------------+

Interactivity

Add a date filter to select a range of dates. When you pick a start and end date:

• The timeline chart updates to show only tasks overlapping that date range.
• The task table filters to show only tasks active in that range.
• The total project days KPI updates to show duration within the filtered range.

This helps focus on specific project periods.

Self Check

If you add a filter to show only tasks starting on or after 2024-06-10, which components update?

• The timeline chart will hide tasks starting before 2024-06-10.
• The task table will list only tasks starting on or after 2024-06-10.
• The total project days KPI will recalculate based on filtered tasks.

Key Result

A project timeline dashboard showing task durations as a timeline chart, total project days, and task details.

Practice

1. What is the main purpose of a Timeline chart in Google Sheets?

easy

A. To sort data alphabetically

B. To calculate sums of numbers in a column

C. To show events over time with start and end dates

D. To create pie charts from data

Solution

1. Step 1: Understand what a Timeline chart displays

   A Timeline chart visualizes events along a time axis, showing when they start and end.

2. Step 2: Compare options to the Timeline chart purpose

   Only To show events over time with start and end dates describes showing events over time with start and end dates, which matches the Timeline chart's use.

3. Final Answer:

   To show events over time with start and end dates -> Option C

4. Quick Check:

   Timeline chart = show events over time [OK]

Hint: Timeline charts always show events with start and end dates [OK]

Common Mistakes:

• Confusing Timeline charts with pie charts
• Thinking Timeline charts calculate sums
• Assuming Timeline charts sort data

2. Which of these is the correct way to insert a Timeline chart in Google Sheets?

easy

A. Select your data, then press Ctrl + C

B. Select your data, then go to Insert > Timeline chart

C. Right-click a cell and choose Insert > Pie chart

D. Use the formula =TIMELINE() in a cell

Solution

1. Step 1: Recall how to insert charts in Google Sheets

   Charts are inserted via the Insert menu after selecting data.

2. Step 2: Identify the correct menu option for Timeline charts

   Select your data, then go to Insert > Timeline chart correctly states Insert > Timeline chart after selecting data.

3. Final Answer:

   Select your data, then go to Insert > Timeline chart -> Option B

4. Quick Check:

   Insert menu > Timeline chart = correct method [OK]

Hint: Always use Insert menu to add charts, not formulas [OK]

Common Mistakes:

• Trying to insert Timeline chart with a formula
• Copy-pasting data instead of inserting chart
• Choosing wrong chart type like Pie chart

3. Given this data in Google Sheets:

Event | Start Date | End Date
A     | 2024-01-01 | 2024-01-05
B     | 2024-01-03 | 2024-01-10
C     | 2024-01-08 | 2024-01-12

If you create a Timeline chart from this data, what will it show?

medium

A. A pie chart dividing events by duration

B. Only Event A because it starts first

C. A bar chart showing event counts

D. Events A, B, and C displayed on a timeline with overlapping dates

Solution

1. Step 1: Understand Timeline chart behavior with overlapping events

   Timeline charts show all events with their start and end dates, even if they overlap.

2. Step 2: Analyze the given data

   Events A, B, and C have overlapping date ranges, so all appear on the timeline overlapping accordingly.

3. Final Answer:

   Events A, B, and C displayed on a timeline with overlapping dates -> Option D

4. Quick Check:

   Timeline chart shows all events with their date ranges [OK]

Hint: Timeline charts show all events even if dates overlap [OK]

Common Mistakes:

• Thinking only the first event shows
• Confusing Timeline chart with bar or pie charts
• Assuming overlapping events are merged

4. You tried to create a Timeline chart but it shows an error. Which of these fixes the problem?

Event | Start Date | End Date
Task1 | 2024-02-10 | 2024-02-05

What should you do?

medium

A. Swap the Start Date and End Date so Start Date is before End Date

B. Delete the End Date column

C. Change the Event name to a number

D. Use a pie chart instead

Solution

1. Step 1: Identify the error cause in Timeline chart data

   The Start Date must be before or equal to the End Date; here it is after, causing error.

2. Step 2: Fix the date order

   Swapping the Start Date and End Date so the start is earlier fixes the timeline error.

3. Final Answer:

   Swap the Start Date and End Date so Start Date is before End Date -> Option A

4. Quick Check:

   Start Date ≤ End Date fixes Timeline chart errors [OK]

Hint: Ensure Start Date is before End Date to avoid errors [OK]

Common Mistakes:

• Deleting End Date column breaks timeline
• Changing event names to numbers is unnecessary
• Switching to pie chart ignores timeline purpose

5. You have a project plan with tasks and their start and end dates. You want to create a Timeline chart that shows tasks grouped by team member. How can you prepare your data in Google Sheets to do this?

hard

A. Add a column for team member and include it in the data range before inserting the Timeline chart

B. Create separate sheets for each team member and make a Timeline chart for each

C. Use a pie chart to show team member task distribution

D. Sort tasks by start date and insert a bar chart

Solution

1. Step 1: Understand Timeline chart grouping feature

   Timeline charts can group events by a category column like team member if included in the data.

2. Step 2: Prepare data with team member column

   Add a column listing team members for each task and select all columns when inserting the Timeline chart.

3. Final Answer:

   Add a column for team member and include it in the data range before inserting the Timeline chart -> Option A

4. Quick Check:

   Grouping in Timeline charts needs category column included [OK]

Hint: Include grouping column in data range to group Timeline events [OK]

Common Mistakes:

• Making separate charts instead of grouping
• Using pie or bar charts which don't show timelines
• Not including the grouping column in the chart data