It has played a successful role in engineering and is now undergoing modifications (to be explained).
In 1990, Bacon had two successful roles.
Canada's successful role in the conflict gave Canada credibility and established it as a nation fighting for the "common good" of all nations.
Simply by existing in a successful role, both bands are effectively working against that mentality.
"He just chose some roles that weren't the best roles, the most successful roles."
In the 1890s, Stewart had fewer successful roles.
If two characters are in opposition, hand to hand combat for example, then the higher successful role is the one that actually succeeds.
Several operas of these composers have become her most successful roles:
After several successful supporting roles, she played the lead in 1923's Souls for Sale.
Orfeu was the most successful role of Mello's acting career.