True or False?

1. Underestimation is the primary cause of project failure? 2. Learning is linear 3. Cutting costs is important and should be a perpetual effort 4. Rough order of magnitude estimates are most often associated with Parametric cost estimating 5. According to Standish, more than 50% of all IT projects experience cost overruns of 51% or more 6. Class 1 estimates are the initial/basic estimate, usually involving the largest range of error 7. When developing a cost estimate, determining the estimates purpose is one of the most important steps 8. Tetlock believes Hedgehogs make better forecasters due to their cognitive style that is biased towards a single idea or approach. 9. Updating an estimate is recommended only when it is easily achieved 10. Engineering cost estimates are quick and easy to develop