With most businesses and with most individuals, life tends to snap you at your weakest link. So it isn’t the strongest link you’re looking for. It’s the weakest link that causes the problem.
When used in speech, hesitancies can indicate a pause for thought, when read in a transcript they indicate uncertainty. In a series of experiments the perceived uncertainty of the transcript was shown to be higher than the perceived uncertainty of the spoken version with almost no overlap for any respondent.
art { Paul Klee, After the drawing 19/75, 1919 }