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Order of magnitude is a rough measurement technique that considers things in powers of ten. Anything less than a power of ten is rounded down for the purposes of comparison. For example, revenue of $1 million and $4 million would be considered the same order of magnitude. Revenue of $60 million dollars is one order of magnitude more than $1 million. A way of thinking about order of magnitude is that it only considers how many zeros a number has in it. Any two numbers that have the same number of zeros are the same order of magnitude.
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| start | end | order of magnitude | | 1 | 9 | 0 | | 10 | 99 | 1 | | 100 | 999 | 2 | | 1000 | 9999 | 3 | | 10,000 | 99,999 | 4 | | 100,000 | 999,999 | 5 | | 1,000,000 | 9,999,999 | 6 | | 10,000,000 | 99,999,999 | 7 | | 100,000,000 | 999,999,999 | 8 | | 1,000,000,000 | 9,999,999,999 | 9 |
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| Type | Computational Mathematics | | Definition | An approximation technique that reduces numbers to their powers of 10. | | Value | Making approximations of big numbers where precision is meaningless or exact values are unknown.
Assigning numbers to general categories for the purposes of comparison.Often used to compare the speed of algorithms and estimate the complexity of problems in science, particularly computer science. | | Examples | An economy car costs two orders of magnitude more than a bicycle.Interstellar space travel is many orders of magnitude more complex and costly than landing on the moon.
| | Related Concepts | Algorithms |
Project Management
This is the complete list of articles we have written about project management.
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A guide to project risk.
A list of basic project management techniques.
A definition of workaround with examples.
A list of project branding techniques.
A definition of project stakeholder management with examples.
A definition of action plan with examples.
The primary types of cost overrun.
The definition of document control with examples.
A guide to project oversight.
A definition of design driven development with examples.
A list of common project risks.
A list of common project stakeholders.
A list of common business risks.
The difference between a risk and an issue.
The four things that can be done about risk.
The definition of secondary risk with examples.
A guide to creating a risk register with an example.
A definition of risk perception with examples.
The common types of implementation.
A reasonably complete guide to project risk management.
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