This view has also been supported by Marchingtan and Wilkinson who strongly criticised some early 1990s writers, referring to human resource planning as at best irrelevant, and at worst misguided and dangerous, in the turbulent and increasingly insecure competitive environment of the late twentieth century. Marchington and Wilkinson have stressed that such opinions misunderstand the nature and uses of the planning process, and can be used to justify "ad-hocery" and reactive management. However, planning is according to them, at least just as important during turbulent times, if not more so, for least four reasons;