Principles of justice and fairness are also central to procedural, retributive, and restorative justice. Such principles are supposed to ensure procedures that generate unbiased, consistent, and reliable decisions. Here the focus is on carrying out set rules in a fair manner so that a just outcome might be reached. Fair procedures are central to the legitimacy of decisions reached and individuals' acceptance of those decisions.
To ensure fair procedures, both in the context of legal proceedings, as well as in negotiation and mediation, the third party carrying out those procedures must be impartial. This means they must make an honest, unbiased decision based on appropriate information.[6] For example, judges should be impartial, and facilitators should not exhibit any prejudice that gives one party unfair advantages. The rules themselves should also be impartial so that they do not favor some people over others from the outset.
An unbiased, universally applied procedure, whether it serves to distribute wealth or deliver decisions, can ensure impartiality as well as consistency. The principle of consistency proposes that "the distinction of some versus others should reflect genuine aspects of personal identity rather than extraneous features of the differentiating mechanism itself."[7] In other words, the institutional mechanism in question should treat like cases alike and ensure a level playing field for all parties.
The principle of standing suggests that people value their membership in a group and that societal institutions and decision-making procedures should affirm their status as members.[8] For example, it might follow from this principle that all stakeholders should have a voice in the decision-making process. In particular, disadvantaged members of a group or society should be empowered and given an opportunity to be heard. When decision-making procedures treat people with respect and dignity, they feel affirmed. A central premise of restorative justice, for example, is that those directly affected by the offense should have a voice and representation in the decision-making process regarding the aftermath of the offense--be it punishment and/or restitution.
Related to issues of respect and dignity is the principle of trust. One measure of fairness is whether society members believe that authorities are concerned with their well being and needs. People's judgments of procedural fairness result from perceptions that they have been treated "honestly, openly, and with consideration."[9] If they believe that the authority took their viewpoints into account and tried to treat them fairly, they are more likely to support and engage in the broader social system.