Dressing up as Braveheart was just one of the zany things Scottish-born Ron Zambonini did in his nine years as CEO of Cognos Inc.

He also offered to strip naked if a software product failed to meet sales expectations. (It met them.) But beyond the craziness lay Congos's results - strong revenue and profit growth, plus status as a world leader in business intelligence software. Zambonini retires from the top job in late June, but will stay on at Cognos as its non-executive chairman.

Why are you leaving?

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I'm 57 and feeling the need to slow down. The company is on a bit of a roll and it seems to be a good time to hand over the reins. Rob Ashe, my successor as CEO, has been training for this job for a couple of years, and is ready to take over.

How will you fill the days?

I'll be the non-executive chairman and I'm on the board of another software company [Reynolds & Reynolds] My hobbies are golf and contract bridge, and I'll pursue them, and spend time with family.

What was the toughest thing in your CEO career?

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In May, 2001, we had to do a layoff [of 300 employees] Every company had to do it when the bubble burst but, gee, it wasn't easy. I often say a failure of management preceded it but, as I look back, I couldn't see it coming. We've come back very strong since then. But, you know, you disrupted people's lives, so it's sad.

Should Rob Ashe worry about being second-guessed by the new chairman?

I've done everything I want to do; I don't need to second-guess him. We've been working together since I came here [in 1989] and most intimately for the past nine years. I've really helped him with his career, and I think I'm leaving this company with a better CEO. When you're the CEO, you form an idea of the demarcation line between what the board does and what the CEO does.

I have a good idea of that and I would hate to think I would cramp Rob's style in any way.

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Did your showmanship help in leading people?

The showmanship probably helped more in the sales area. When you go down to the Americans' [software]kickoffs, your people want to see the CEO's willingness to go out on a limb. They want to see that brashness. You have to be credible too, but to put on a Braveheart costume--it's a question of building up a persona.

So it helps to be prudent while offering this wild image?

I hope that people would call me conservative in management. We've been able to have pretty good results. But there's that zaniness--it's the combination that works.

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You've had what you describe as a "hate-hate relationship" with rival Business Objects SA of France. Is it that personal?

It's definitely personal.This has been a very strong competitive war over 10 years. It's still going on.

The regret was that we never buried them.. . .They sued us for intellectual property and we ended up handing them $24 million. [Cognos agreed to a negotiated settlement in a patent infringement lawsuit.]You can imagine my face when I handed that over. [The public]doesn't see all the things--a lot of sales situations where perhaps the tactics they used were nowhere near what I would do. It just makes you angry.

So these are not people you would have a drink with?

I certainly wouldn't. Actually, I've had a chance to debate [Business Objects CEO]Bernard Liautaud in public. I think people could see the difference between us. Bernard is younger and has built the company from nothing to almost a billion dollars, so he's a very smart guy. But he's good-looking and slim and I'm not good-looking and I'm chubby.

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He hasn't got the sense of humour that I have, nor the openness. I'm just not his favourite guy. He's not my favourite guy.