"broadening responsibility" is correct and usable in written English.
You can use it when referring to increasing someone's range of duties or the scope of their accountability. For example, "The company is committed to broadening responsibility by offering employees more opportunities for leadership and decision-making."
In New York's political circles, Ms. Harris's broadened responsibilities were viewed with amazement.
The broadened responsibilities of central banks in the second half of the 20th century were accompanied by greater government interest in their policies; in a number of countries, institutional changes, in a variety of forms, were designed to limit the traditional independence of the central bank from the government.
Broadening responsibilities go beyond diabetes management tasks such as glucose self-monitoring and insulin administration and should include scheduling appointments and ensuring a proper supply of medications and supplies.
Gregg will retain coverage responsibilities for many of his clients while broadening his responsibility for sourcing and executing transactions across all industry groups.
The law broadened the responsibility of the agency, stretching its reach to the dark corners of the $300 trillion derivatives market at the center of the financial crisis.
The lobbying efforts of parents and professional organizations broadened public responsibility for children with disabilities (birth — 21 years), entitling them to a free and appropriate education (Turnbull & Turnbull, 2000).
Ms. Gleboff was hired in 1959 to administer scholarships given to the school by the Ford Foundation but soon broadened her responsibilities.
Citigroup broadened the responsibilities of four of its top executives yesterday, generating new speculation about who will succeed Sanford I. Weill as chairman and chief executive.
Mr. Putin has pledged to serve as Mr. Medvedev's prime minister, and he has already indicated that he will broaden the responsibilities of that position, which since the Soviet Union's fall has typically been administrative.
E1 BUSINESS DAY C1-16 Reshuffling at Citigroup Citigroup broadened the responsibilities of four of its top executives, generating new speculation about who would succeed Sanford I. Weill as chairman and chief executive.
