contact us

ECOS is maintained for ESA by:

ESA Cost Engineering Section (

Telephone:             +31 71 565 3227


​© 2018 by Massimo Magazzu. 

ECOS Help Desk



Telephone:             +31 71 565 6500

Easy steps to build a good WBS

These Quick Guidelines will provide, in few words and with some illustrations, few hints and tips about how to properly and efficiently create WBS. It is recommended to beginners to also follow the Self-Training course or attend an ECOS training at ESTEC in order to get familiar with such practice.