You can't just rely on the RCW. If you did, then it would appear that a wide swath of items would qualify to follow under this exemption. And that's just not so. It is a very narrowly defined exemption, thanks to a number of court rulings. The Attorney General's Office has all of the information up on their Web site on the open public records act and the open public meetings act to help the regular person make sense of the law.
http://www.atg.wa.gov/OpenGovernment/InternetManual/Chapter2.aspx 2 Specific Exemptions from Disclosure
Deliberative Process (Preliminary Drafts, Notes, Recommendations, Intra-Agency Memoranda)
Statutory Provision: Preliminary drafts, notes, recommendations, and intra-agency memorandums in which opinions are expressed or policies formulated or recommended [are exempt from disclosure] except that a specific record shall not be exempt when publicly cited by an agency in connection with any agency action. RCW 42.56.280.
See generally Section 7.3(4), Public Records Act Deskbook: Washington’s Public Disclosure and Open Public Meetings Laws (Greg Overstreet, ed.) (Wash. State Bar Assoc. 2006) (available for purchase); WAC 44-14-06002(4).
Preliminary drafts or recommendations may be withheld by an agency but only if they pertain to the agency's deliberative process and show the exchange of opinions within an agency before it reaches a decision or takes an action. The purpose of this exemption severely limits its scope. Progressive Animal Welfare Soc'y v. University of Wash., 125 Wn.2d 243, 256, 884 P.2d 592 (1994); Hearst Corp. v. Hoppe, 90 Wn.2d 123, 580 P.2d 246 (1978). Its purpose is to "protect the give and take of deliberations necessary to formulation of agency policy." Hearst Corp. v. Hoppe, at 123; Progressive Animal Welfare Soc'y v. University of Wash., at 256.
The test to determine whether a record is covered by this exemption has been summarized by the Supreme Court as follows:
In order to rely on this exemption, an agency must show that the records contain predecisional opinions or recommendations of subordinates expressed as part of a deliberative process; that disclosure would be injurious to the deliberative or consultative function of the process; that disclosure would inhibit the flow of recommendations, observations, and opinions; and finally, that the materials covered by the exemption reflect policy recommendations and opinions and not raw factual data on which a decision is based. Progressive Animal Welfare Soc'y v. University of Wash., 125 Wn.2d at 256. It is not, however, required that documents be prepared by subordinates to be exempt. ACLU v. City of Seattle, 121 Wn. App. 544, 552, 89 P.3d 295 (2004).
The exemption applies only to documents that are part of the deliberative or policy-making process; records about implementing policy are not covered. Cowles Publishing v. City of Spokane, 69 Wn. App. 678, 849 P.2d 1271 (1993), review denied, 122 Wn.2d 1013 (1993). For this reason, inter-agency (as opposed to intra-agency) discussions probably are not covered by this exemption. Columbian Publishing Co. v. City of Vancouver, 36 Wash. App. 25, 671 P.2d 280 (1983).
Matters that are factual, or that are assumed to be factual for discussion purposes, must be disclosed. Brouillet v. Cowles Publishing Co., 114 Wn.2d 788, 791 P.2d 526 (1990); Hearst Corp. v. Hoppe, 90 Wn.2d 123, 580 P.2d 246 (1978) (description of a taxpayer's home by a field assessor treated as fact by agency appraisers). Thus, unless disclosure would reveal or expose the deliberative process, as distinct from the facts used to make a decision, the exemption does not apply. Hearst Corp. v. Hoppe, at 133. Moreover, once the policies or recommendations are implemented, those recommendations, drafts and opinions cease to be protected under this exemption. Progressive Animal Welfare Soc'y v. University of Wash., 125 Wn.2d 243, 257, 884 P.2d 592 (1994). An evaluation of a real property site requested by a city attorney was exempt from disclosure under the deliberative process exemption where it was cited as the basis for a final action. Overlake Fund v. City of Bellevue, 60 Wn. App. 787, 810 P.2d 507 (1991), appeal after remand, 70 Wn. App. 789, 855 P.2d 706, review denied, 123 Wn.2d 1009 (1994) (study ultimately withheld on other grounds). Subjective evaluations are not exempt under this exemption if they are treated as raw factual data and not subject to further deliberation and consideration. Progressive Animal Welfare Soc'y v. University of Wash., 125 Wn.2d at 256-57; Hearst Corp. v. Hoppe, 90 Wn.2d at 134.
Case example: A public agency conducts an internal review of a specific problem. A report is prepared consisting of an overview of the problem, information collected or reviewed, and recommendations for policy changes.
Resolution: The recommendations for policy changes are the only parts of the report likely to be exempt, unless the agency can show that the remainder of the report contains information that is inextricably intertwined with the recommendation. The agency must show that release of the factual or discussion portions would be the same as releasing the recommendations. This situation seldom exists and, for that reason, an agency must usually disclose parts of predecisional memos before it makes a final decision.