Under the Basel III framework, how have operational risk capital measurement methods evolved? Please elaborate on the key characteristics, advantages, and disadvantages of the new Standardized Approach (SA) compared to prior methods. What impact do you anticipate this will have on banks' operational risk management practices?

巴塞尔协议III框架下，操作风险资本计量方法经历了怎样的演变？请你详细阐述新的标准化方法（Standardised Approach, SA）与之前方法相比的主要特点、优势劣势，并谈谈你认为这对银行操作风险管理实践会带来哪些影响？