Remove Article Remove Estimate Remove Software Remove Software Engineering
article thumbnail

Basis of Estimating Software Development

Herding Cats

The estimating of software development is both straightforward and complex. When it is suggested that estimating is hard, of no value, and unnecessary, always ask what principle is used to support that claim? Software Sizing and Estimating: Mk II FPA , Charles Symons, John Wiley & Sons, 1991. Don't hear one?

article thumbnail

Why Johnny Can't Estimate? (Update)

Herding Cats

I work in a domain where engineered systems are developed for complex software-intensive system of systems. These systems are engineered with a variety of development methods. There is a discussion of the conjecture that estimates are a waste, estimates can't be done, estimates are evil, estimates must be stopped immediately.

Insiders

Sign Up for our Newsletter

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

article thumbnail

Estimating Accuracy Mathematics

Herding Cats

In the estimating business, like many things in project management, there is confusion about principles, practices, and processes. A good estimation approach should provide estimates that are within 25% of the actual results, 75% of the time. Software Engineering Metrics and Models. Dunsmore and V.Y.

article thumbnail

The Economics of Decision Making on Software Projects

Herding Cats

The classic paper “ Software Engineering Economics,” Barry Boehm, IEEE Transactions on Software Engineering , Vol SE-10(1), 1984, pp. For software development, there are many decisions to be made. Related articles. Why Guessing is not Estimating and Estimating is not Guessing.

article thumbnail

How to Estimate Any Software Problem

Herding Cats

ways to make decisions with No Estimates. Uncertainty of course is present in all software development work both reducible and irreducible uncertainty. can we make a decision in the presence of Uncertainty without making an estimate of the impact or outcome of that decision? An estimate is. It's a fallacy.

article thumbnail

Why Johnny Can't Estimate?

Herding Cats

I work in a domain where engineered systems are developed for complex software-intensive system of systems. These systems are engineered with a variety of development methods. Since all risk comes from uncertainty - reducible (Epistemic) and irreducible (Aleatory), estimating is a foundation of all we do.

article thumbnail

4 Fallacious Reasons to Estimate and Why Those Are Fallacious

Herding Cats

There's a recent post titled Four Fallacious Reasons to Estimate. It lists the usual suspects for why those spending the money think they don't have to estimate how much they plan to spend when they'll be done producing the value they've been assigned to produce for that expenditure. Let's look at each one in more detail.