It's rarely developers turning estimates into commitments. Many even have stories of managers refusing to accept estimates because the deadline was decided alre

It's rarely developers turning estimates into commitments. Many even have stories of managers refusing to accept estimates because the deadline was decided already. A developer trying to communicate a clear perspective that does not make commitments will be seen as attempting to weasel out of a discussion in such an organization. Customers understand 95% confidence better than they understand coding spikes in my experience.