This is the 5835th most frequent Russian word.
разработал
"Разработал" means "developed" or "designed."
In this sentence, 'разработал' refers to the act of creating or designing something, in this case, a new plan.
Он разработал новый план для компании.
He developed a new plan for the company.
Here, 'разработал' signifies the development of a detailed and conceptual task, such as creating an algorithm in a scientific context.
Учёный разработал сложный алгоритм для анализа данных.
The scientist developed a complex algorithm for data analysis.
In this example, 'разработал' indicates the action of organizing or planning something carefully, specifically creating a personal schedule.