ITIL Certifications < Good procedures and realistic approach help, but proper human belongings are however wanted. There isn't always anyt any opportunity however for a senior challenge manager, particularly withinside the primary steps of the approach implementation or in crucial investments. References AACE Inc. (2005). AACE International Recommended Practice No. 18R-97: Cost estimate kind device – as carried out in engineering, procurement, and manufacturing for the device industries. TCM Framework: 7.3 – Cost Estimating and Budgeting. February 2, 2005. Akselrad, F., & Muiño, A. (2006). Metodología de gestión – Proyecto PDR – PESA. Presented withinside the “II Seminário International de Gerenciamento de Projetos da Petrobras.” Universidade Petrobras – PMI® , Salvador, Brasil, 05 a 07 de Dezembro de 2006.