create WBS cloud transformation program

Hello Karim - and welcome to PMI's Online Community! I recommend doing an advanced search using specific keywords. This will generate a compilation of similar discussion-related threads, articles, templates, etc. Here are a a couple resources I found that may be of interest: 

https://www.projectmanagement.com/delivera...--example 
https://www.projectmanagement.com/deliverables/311169/process-improvement-work-breakdown-structure--wbs--example 
https://www.projectmanagement.com/deliverables/311173/software-implementation-work-breakdown-structure--wbs--example 
https://www.projectmanagement.com/deliverables/960630/work-breakdown-structure--wbs--dictionary-template 
https://www.projectmanagement.com/deliverables/500955/wbs-generator 

 
You can leave a comment at the end for others to see and offer helpful solutions. I hope this helps and as a new member to the Online Community, please take a moment to introduce yourself to PMI’s Online Community at https://www.projectmanagement.com/discussion-topic/193917/welcome--introduce-yourself-to-pmi-s-online-community. All the best!