The part of the sentence "has been planned" is correct and can be used in written English. You can use it to describe something that has been planned in advance. For example: "The company's strategic plan has been planned for the next five years.".
"None of it has been planned.
The operation has been planned for months.
A memorial has been planned for April 15th.
All has been planned in great detail".
"This is how it has been planned".
The producers say it has been planned for a while.
Programming has been planned for novices and connoisseurs alike.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union