Implementation as Control: Enforcement and Execution of Policy Decisions Accordingly, implementation is perceived as technical problems of control over the internality and externality of the policy, which has been specified by Sabarier and Mazmanian as follows Tractability of the problem Availability of valid technical theory and technology Diversity of target-group behavior Target group as percentage of the population Extent of behavior change requiredAccordingly, implementation is perceived as technical problems of control over the internality and externality of the policy, which has been specified by Sabarier and Mazmanian as follows Tractability of the problem Availability of valid technical theory and technology Diversity of target-group behavior Target group as percentage of the population Extent of behavior change required Implementation as Control: Enforcement and Execution of Policy Decisions