Why are capacity forecasts generally wrong? What can be done to reduce forecasting errors? Alternatively, share any personal experiences that were successful with reducing forecast errors.

Why do few organizations construct control charts and use them to monitor forecast errors and what can be done encourage the construction and use of control charts? Also, please share any personal experiences of when control charts were used and why they were successful - or not, with monitoring or reducing forecast errors.

Support your opinion with a relevant example or reinforce your position(s) with applicable reference cite.