
Time Predictions
by Torleif Halkjelsvik, Magne Jørgensen · Business
About this book
Predicting the time needed to complete a project, task or daily activity can be difficult and people frequently underestimate how long an activity will take. This book sheds light on why and when this happens, what we should do to avoid it and how to give more realistic time predictions. It describes methods for predicting time usage in situations with high uncertainty, explains why two plus two is usually more than four in time prediction contexts, reports on research on time prediction biases, and summarizes the evidence in support of different time prediction methods and principles. Based on a comprehensive review of the research, it is the first book summarizing what we know about judgment-based time predictions. Large parts of the book are directed toward people wishing to achieve better time predictions in their professional life, such as project managers, graphic designers, architects, engineers, film producers, consultants, software developers, or anyone else in need of realistic time usage predictions. It is also of benefit to those with a general interest in judgment and decision-making or those who want to improve their ability to predict and plan ahead in daily life. This open book is licensed under a Creative Commons License (CC BY). You can download Time Predictions ebook for free in PDF format (2.6 MB).
Key Insights
- The 'Planning Fallacy' Neutralizer: Master evidence-based methods to counteract the cognitive biases that lead professionals to consistently underestimate project timelines.
- Systems of Uncertainty: Understand why traditional additive estimation (2+2) fails in complex environments and how to account for the non-linear expansion of time in high-uncertainty scenarios.
- Judgment-Based Accuracy: Leverage a comprehensive synthesis of psychological research to transition from 'gut-feeling' guesses to rigorous, data-supported time predictions.
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