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Humans have been formulating computational logic for execution on digital microprocessors (aka software development) for just a few years, and some people think that this profession is already a full-fledged engineering discipline.

I think this is not the case yet (by far).

Thinking otherwise actually impede the growth of this line of work into higher level of consciousness that allow us to get out of the same expired and twisted mindsets similar to waterfall-like development processes.

A trait of the infant state of our profession is the frequency of incomplete design work as a significant cause for software development projects failures, incomplete work in a central activity and outcome: design.

A mayor factor for such mediocrity comes from a misunderstanding of the role of abstraction in design work, which leads to incomplete design decisions hence incomplete designs that are supposed to be carried out without any mayor design changes.

A role of abstraction is to manage complexity, focusing on a selected set of design attributes at a given time, ignoring —just for that moment— other equally important attributes; waiting for their turn in the co-evolution process of design.

A professional software designer takes complete design decisions. A design decision is completed when the designer walks the abstraction stack all the way down and returns up to the starting level with a set of implications for that particular decision, turning it to a fully informed and conscious design decision.

The fatal state of affairs for software development projects casting crappy software is when designers do not come back and consider the attributes they left behind in their mental stimulation so-called 'abstracting' or 'modeling'.

So, we all can see that abstraction is not a mean for incomplete or insufficient work; abstraction means putting things aside for the moment, for complexity management purposes, not for leaving aspects of your work in a hang state.

One of the differences between Internet Explorer and standards compliant Web browsers that cause a lot of trouble for CSS beginners is the CSS box model. Since the box model is what browsers use to calculate an element's total width and height, it is quite understandable that different browsers producing different results can be both confusing and frustrating.

How the CSS box model works has been explained by others many times already. Nonetheless I still see questions related to the CSS box model on forums and mailing lists, and frequently encounter sites that expect browsers to use Internet Explorer's non-standard way of calculating box dimensions. That is why I have written this article, which to a large extent is a translation of an article I wrote for Swedish magazine CAP&Design earlier this year.

If you already know how the different box models work and how to handle Internet Explorer, there is nothing new for you here. If you get different box dimensions in IE and other browsers without knowing why, keep reading.

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During the development of a software product we all make numerous design decisions. Some decisions are done in early stages of development, while analyzing the requirements and gathering the overall architecture of the product. Other design decisions are done during the lower-level design. Finally, even during the implementation of the a single component, we are often in position to weight several design options against each other.

In the following discussion we will examine one of the common design aspects, which is the source of numerous design dilemmas: should we design the product such that it will be ready for a future change (in the requirements, in technology etc.), or should we settle for a straight forward implementation? When is our product “sufficiently-designed” and when is it “over-designed”? In other words, how can we find the golden path when it comes to designing a software system to be ready for future changes?

Read the article...

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