Incrementalism, also disdainfully called disjointed incrementalism, is a policy making process which produces decisions only marginally different from past practice. Some analysts describe incrementalism as muddling through, in contrast to the ideal of the rational-comprehensive model of policy planning.
Incrementalism – Profwork.org profwork.org/pp/formulate/inc.html
“Lindblom’s  ‘disjointed incrementalism’, where policymakers pursue a limited range of well-analysed policy alternatives, is particularly relevant in this case, which sees an inherently conservative approach to policy-making preferred. Kent and Mercer  found this policy development technique was typified in the development of the former Liberal (conservative) Government’s MRET.”
(Simpson and Clifton, 2014:133)
Simpson G. and Clifton, J. 2014. Picking winners and policy uncertainty: Stakeholder perceptions of Australia’s Renewable Energy Target. Renewable Energy, Vol. 67, pp.128-135.