The investigative judgment is a unique Seventh-day Adventist doctrine, which asserts that the divine judgment of professed Christians has been in progress since 1844. It is intimately related to the history of the Seventh-day Adventist Church and was described by the church's prophet and pioneer Ellen G. White as one of the pillars of Adventist belief. It is a major component of the broader Adventist understanding of the "heavenly sanctuary", and the two are sometimes spoken of interchangeably.
The investigative judgment teaching was the focus of controversy within the denomination in 1980, when Adventist theologian Desmond Ford had his ministerial credentials withdrawn by the Church after openly criticizing the doctrine. While the Adventist mainstream believe in the doctrine and the church has reaffirmed its basic position on the doctrine since 1980, some of those within the church's more liberal progressive wing continue to be critical of the teaching.
According to a 2002 worldwide survey, local church leaders estimated 86% of church members accept the doctrine, although 35% believe there may be more than one interpretation of the sanctuary belief.
The emphasis of this belief has evolved over time, but the basis is the same. The year 1844 is believed to be the time Christ commenced a new phase of ministry in the Most Holy Place of the heavenly sanctuary, symbolised by the Day of Atonement ceremony described in Leviticus 16. In the years immediately after World War II, Adventism tended to view the judgment in stern tones and the teaching has increasingly been understood as God on the side of people.
Smuts van Rooyen describes a "string of changing interpretations we have given this prophecy from Second Coming, to Shut Door, to Investigative Judgment, to cleansing the Living Temple, to Vindication of God’s Character, to simple Pre-advent Judgment..."