The law does require that such workers get back the same job unless business necessity makes that impossible.

法律规定，除非商业必要性促使工作无法完成，否则这些工人必须恢复休假前的工作。

However, factors like limited time and resources, the rate at which a company (truly or falsely) believes it will be impacted by digital technologies, and business necessities in an unpredictable market sometimes make it reasonable to choose the informal approach.

然而，有限的时间和资源、公司（真实或错误）相信自己将受到数字技术影响的程度以及不可预测的市场中的业务必需品等因素有时使选择非正式方法变得合理。