liveBook · Manning

Fibonacci sequence

As explained in Lead Developer Career Guide

A mathematical sequence in which each term is formed from the preceding terms and whose increasing gaps provide scale values for relative estimation.

The Fibonacci sequence provides increasing values for estimating relative effort in story points. A task scored 1 represents the lowest effort, while a task scored 13 represents the highest effort; larger gaps reflect increasing complexity and uncertainty. section 7.2.2

Use the sequence as one option among several estimation approaches:

  • Compare tasks by relative effort rather than predicted hours. section 7.2.2
  • Choose it alongside or instead of Planning Poker and T-Shirt Sizing, depending on what suits the team. section 7.2.2
  • Review and revise estimates as the project develops. section 7.2.2

Search-feature estimates

A search feature can be rated from 1 point for creating an empty page framework to 5 points for implementing search filters, with intermediate values for filters, results, and standard search functionality. section 7.2.2

Table 7.3 Measuring story points for a search feature (view table figure)

Story Points

Description

Tasks

1

Lowest effort

Creating an empty search page framework

2

Low to medium effort

Displaying search filters

3

Medium effort

Displaying search results

4

Medium to high effort

Implementing standard search functionality

5

Highest effort

Implementing search filters

Browse the task-by-task table to compare story-point values with concrete search-feature work. section 7.2.2

How Lead Developer Career Guide covers it

How deep it goes
Defines relative effort and contrasts estimation methods, but does not develop the sequence mathematically.
Examples
Uses search-feature tasks scored from 1 to 5, ranging from an empty page framework to search filters.
What you can do after
Apply it via story-point estimation to compare task effort and revise estimates during a project.
How it connects
Connects story points with task complexity, uncertainty, risk, Planning Poker, and T-Shirt Sizing.

Also explained in

Compare how 6 books explain Fibonacci sequence →

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Lead Developer Career Guide. The section links point to the parts of the book it draws on.