project management - Understanding the role of the species known as "PM" -

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As a professional programmer I work daily with a species named "PM". Although they usually go from that normal amount, it seems that there are actually many discrete types: product manager, project manager, and program manager. Other species have not yet been overlooked. During the observation and study years, the subtlety of their discrimination started wooing me. I am only able to set my general responsibility: To me, to communicate in the most possible words to the programmer, what do they think that they want to create them, I say to them, probably in the most possible words, when I think That it will be distributed, and they will go away.

So my question is that the question of Jarzrot for the Stackworflow crowd: Please see Product Manager, Project Manager, and Program Manager. Please do this by waving your hands, because I can not see them, and it does not help anyway.

I try to explain them because I have worked with them. Please understand that the definitions can be unclear and the organization may change in the organization.

Project Manager: It should be the only person responsible for coordinating the project's program within engineering, which is the current state of committed work for a given release Address can be done for management. This person is usually deep hip in Spreadsheets, Gantt Chart and Status Meetings.

Product Manager: is responsible for deciding which user-visible features a release in a plate should be well aware of this person using the customer software Is trying to understand and understand how to be created from a functional point of view as a developer's resource.

Program Manager: Originally a project manager responsible for coordinating the release of a company in various subjects. This is the person who ensures that a press release is being issued for marketing, as the engineering ship is ready and that product has been trained on the product.

Here are some of the companies I have worked in, who have defined roles, but you certainly will see many variations.


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