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I was wondering if you could explain me what is the difference between a user journey and a task flow? I tried to read and look for example images in Google...and I can't find the difference between them. Both of them are presented in flow charts??

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up vote 10 down vote accepted

Task flows are a tool to help us think through the design before a feature is actually developed. They allow us to interject the user into the flow of the application and determine if the conceptual model agrees with the user model.

Task flow is in relation to the activity flow within the application.

Customer journey maps are documents that visually illustrate an individual customer’s needs, the series of interactions that are necessary to fulfill those needs, and the resulting emotional states a customer experiences throughout the process.

User Journey encompasses task flow by virtue that it contains information on how the user interaction with the application begins, environmental/situational factors which lead to the usage of the application in the first place and also considers the qualitative factors such as the user's emotions, expectations, behavior, etc.

Further reading on user journey: http://www.uxmatters.com/mt/archives/2011/09/the-value-of-customer-journey-maps-a-ux-designers-personal-journey.php

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A task flow is larger than a user journey.

'User journey' is typically used to talk about the 'path' of interface views and actions that the user follows in executing his or her task. That task is the larger set of actions - including actions outside the computer system - for achieving a particular goal.

For instance, if I am looking for a good CD to buy my sister for her birthday, my task flow is to find CDs I know she is interested in by executing multiple user journeys that involve me running searches on different e-commerce sites.

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Can't it be the other way around too, that a User Journey is larger than a Task Flow. For example the User Journey of finding a good CD includes different Task Flows like Recommendations with Preview Listening; Browsing "More like this"; or "Price comparison", all with their own different Task Flows. – JOG Nov 4 '13 at 20:52
    
I agree - I think of the Journey as the big picture, comprised of many smaller tasks, more or less the exact opposite of the above description. – Mattynabib Nov 12 '14 at 0:37

There seems to be little agreement on which is bigger: Task Flow or User Journey and I'm going to throw another spanner in here. Why are Task Flows not the same as Use Cases? It seems to me that a task is a single completed function of a total system - so too is a Use Case

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This reads more as a question than an answer. Could you rephrase it? – Mayo Mar 2 at 12:18

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