Opinion
Petitioner, National Steel Products Company, seeks review of an order granting real party in interest, Jules Rosen dba Pantsmaker, discovery of a report prepared by an expert identified as a witness for petitioner in the instant case. Petitioner argues that the report should be non-discoverable because of the attorney-client and work product privileges, and, in the alternative, that the report should be discoverable only to the extent it is relevant.
The expert’s report is a technical engineering analysis of a metal building in New York. It was prepared in 1979 to assist counsel in prior New York *482 litigation in which it was alleged that the building was, among other things, negligently designed, fabricated, and erected by petitioner. Real party in interest was not a party to that litigation. No portion of the report was ever disclosed during the New York litigation. Three pages of the calculations also prepared by the expert were disclosed, one page by court order, two pages voluntarily. The expert was neither deposed nor identified as a trial witness in the New York litigation. The New York litigation was settled prior to trial.
In the instant litigation, real party in interest alleged that petitioner designed, drafted, fabricated and manufactured the components of a metal building in Banning, California, in violation of the American Institute of Steel Construction manual, section 1.10.10 et seq. 1 Petitioner’s attorney for the California litigation solicited the expert’s New York report from petitioner’s counsel for the New York litigation for background purposes. After receiving express authorization from petitioner, New York counsel forwarded the expert’s report and calculations. Thereafter, New York counsel was joined as cocounsel for petitioner in the instant litigation.
In addition, petitioner’s attorneys commissioned the New York expert to prepare an engineering analysis of the California building. The resulting calculations have been deposed, identified and inspected. The expert’s declaration for petitioner states that in preparing his calculations and reaching his opinion regarding the California building, he “. . . did not refer to, refresh [his] recollection from or rely in any manner upon ...” his 1979 report on the New York building. Petitioner does not intend to offer the New York report as evidence. The expert has been identified as an expert witness in the instant litigation pursuant to Code of Civil Procedure section 2037.
Attorney-Client Privilege
Petitioner contends that the expert’s prior report is nondiscoverable because it is protected by the attorney-client privilege. We disagree.
If certain prerequisites are met, a client ”... has a privilege to refuse to disclose, and to prevent another from disclosing, a confidential
*483
communication between client and lawyer . . . .” (Evid. Code, § 954; see
City & County of S. F.
v.
Superior Court
(1951)
Communication by a client retains its confidential nature, though made to an agent of the attorney, if the disclosure to that agent is reasonably necessary for the transmission of the information to the attorney. (Evid. Code, § 952; Witkin, Cal. Evidence (2d ed. 1966) Communication to Lawyer’s Agent, § 806, p. 750.) Here, because the attorney for the New York litigation hired the engineering expert to provide a technical analysis on the petitioner’s metal building in New York, it was reasonably necessary for the expert to receive information from the client. (See
City & County of S. F.
v.
Superior Court, supra,
Real party in interest contends that the expert’s report here related to a material object of the client, the building in New York, and therefore the expert’s analysis of that building did not require “confidential communications” from the client. This contention is valid to the extent the expert’s analysis of the material object is based entirely on information available to both litigating parties.
(San Diego Professional Assn.
v.
Superior Court
(1962)
Although the party asserting the privilege generally has the burden of proof regarding the existence of the privilege
(D. I. Chadbourne, Inc.
v.
Superior Court
(1964)
*484 Real party in interest contends that petitioner waived the attorney-client privilege by expressly authorizing its attorney for the New York litigation to transmit the expert’s report on the New York building to its California attorney for the instant litigation.
The attorney-client privilege protects the client. (See Evid. Code, § 954.) The client does not waive this privilege by allowing disclosure of confidential communications to a second attorney when reasonably necessary for the accomplishment of the purpose for which the attorney was hired, as is here the case. (See Evid. Code, § 912, subd. (d).)
Real party in interest also contends that by identifying the expert as a witness the petitioner waived the attorney-client privilege.
“If the client calls his attorney as a witness to testify to matters that the attorney could only have learned through the attorney-client relationship, he waives the privilege . . . .”
(People
v.
Dubrin
(1965)
Just prior to its holding regarding waiver of the attorney-client privilege, and after a discussion of the work-product privilege,
Sanders
v.
Superior Court, supra,
*485
Consistent with
Sanders,
under the Discovery Act “[m]aterial which would not be privileged against disclosure at the trial is not privileged against pretrial discovery.” (27 Cal.Jur.3d (1976) Discovery and Depositions, § 12, p. 555, fn. omitted; see
Greyhound Corp.
v.
Superior Court, supra,
56 Cal.2d at pp. 383-385.) “[F]acts should be liberally construed in favor of discovery, ...”
(Greyhound Corp.
v.
Superior Court, supra,
at p. 383.) “ ‘The way is now clear, consistent with recognized privileges, for the parties to obtain the fullest possible knowledge of the issues and facts before trial.’ ”
(Id.,
at p. 385, quoting
Hickman
v.
Taylor
(1947)
Accordingly, we hold here applicable the conclusion of
Sanders
that “. . . the information and opinion of an expert respecting the subject matter about which he is a prospective witness are subjects of discovery by interrogation or deposition procedures and, if submitted in a report confined thereto, by production of such a report.”
(Sanders
v.
Superior Court, supra,
In addition, because the expert’s prospective testimony will necessarily disclose a “significant part” of the privileged communication to the expert, the privilege is waived with respect to all communications to that expert. (See Evid. Code, § 912, subd. (a).)
Work Product Privilege
Petitioner also contends that the expert’s prior report is protected from discovery because of the work product privilege.
A threshold inquiry is whether New York law on the work product privilege should here apply because the report sought was prepared for prior litigation in New York. Real party in interest contends that New York case law holds that the attorney’s work product privilege does not extend to subsequent litigation, and that New York law should be applied.
Assuming arguendo that New York law does not extend the work product privilege to subsequent litigation, we hold that California law
*486
should be applied in this case. (See
Fellows
v.
Superior Court
(1980)
Here California has a legitimate interest in the application of its law and policy, and New York has little or none. “It is the policy of [California (i) to preserve the rights of attorneys to prepare cases for trial with that degree of privacy necessary to encourage them to prepare their cases thoroughly and to investigate not only the favorable but the unfavorable aspects of such cases and (ii) to prevent an attorney from taking undue advantage of his adversary’s industry or efforts.” (Code Civ. Proc., § 2016, subd. (g).) In
Fellows
v.
Superior Court, supra,
In contrast, whatever the policy interests of the New York rule, they have little or no import as applied to this California lawsuit. The building that is the subject of this lawsuit is located in California and petitioner is a Texas corporation with its principal place of business in Texas. Moreover, California law will apply to all substantive issues in this case. Based on these facts, and the narrow context of the conflicts dispute, forum, shopping is not a legitimate concern of New York. (See Reich v. Purcell, supra, 67 Cal.2d at pp. 555-556.) Consequently, the interest New York has is purely local and unsubstantial. (See id., at p. 556.) New York can still apply its rule to subsequent litigation in New York.
Real party in interest’s contention that New York law regarding the work product privilege for subsequent litigation should apply fails the California governmental interest test. Therefore, the work product discussion below will be based on California law.
*487
The California definition of work product is here satisfied. Within the meaning of work product is “[m]aterial of a derivative or interpretive nature obtained or produced in preparation for trial. Such material includes . . . findings, opinions, or reports of experts.” (2 Jefferson, Cal. Evid. Benchbook (2d ed. 1982) § 41.1, p. 1473; see
Williamson
v.
Superior Court
(1978)
The work product privilege is conditional as it relates to the expert’s report; therefore, "... good cause normally must be shown to compel discovery of expert opinions in advance of trial, ...”
(Williamson
v.
Superior Court, supra,
Code of Civil Procedure section 2016, subdivision (b) strikes a balance between the conflicting purposes of the work product privilege and modern discovery rules. On one hand, the work product privilege exists to encourage attorneys to prepare their cases thoroughly and to investigate favorable as well as unfavorable aspects of such cases, and to prevent an attorney from taking undue advantage of his adversary’s efforts. (Code Civ. Proc., § 2016, subd. (g); see
Hickman
v.
Taylor, supra,
In balancing the work product privilege against discovery, “‘[t]he rule predicated on fairness articulated in the decisions is a shield to prevent a litigant from taking undue advantage of his adversary’s industry and effort, not a sword to be used to thwart justice or to defeat the salut[a]ry objects of the Discovery Act.’”
(Williamson
v.
Superior Court, supra,
Real party in interest contends that good cause to discover the expert’s report exists because the expert was identified as an expert witness.
Generally, good cause includes a showing that the expert may be called as a witness.
(Williamson
v.
Superior Court, supra,
Here the expert of whose report discovery is sought was identified as an expert witness pursuant to Code of Civil Procedure section 2037, subdivision (a). “[F]or each expert witness identified, all discoverable reports and writings concerning each expert witness’s proposed testimony and preparations to testify shall be produced according to the provisions of this article.” (Code Civ. Proc., § 2037.3.) As discussed in the context of the attorney-client privilege above, in a general sense, on its surface, the New York report concerns the expert witness’ proposed testimony. (See Code Civ. Proc., § 2037.3; Review of Selected 1982 California Legislation (1983) 14 Pacific L.J. 357, 465.) The expert’s previous report on the New York building may either support or impeach the expert’s new conclusions regarding the California building.
Not all work the potential expert witness has performed for counsel, however, is properly the subject of appropriate pretrial discovery. (See
Swartzman
v.
Superior Court, supra,
231 Cal.App.2d at pp. 203-204.) In
Scotsman Mfg. Co.
v.
Superior Court
(1966)
More fully, the court in Scotsman Mfg. Co. v. Superior Court stated that: “[I]f and when the expert becomes a potential witness on behalf of the client the product of his employment is subject to discovery. However, the mere *489 fact the expert may have the dual status of a prospective witness and of adviser to the attorney, does not remove the product of his services rendered exclusively in an advisory capacity, as distinguished from the product of services which qualify him as an expert witness, from the work product limitation upon discovery. Under the ruling in Swartzman, the information and opinion of the expert respecting the subject matter about which he is a prospective witness are subjects of discovery by interrogation or deposition procedures and, if submitted in a report confined thereto, by production of such a report. . . . However, wherever the report may include the information and opinions of the expert given to the attorney not only in his capacity as a prospective witness but also as an adviser in the preparation of the client’s defense, it is subject to the work product limitation prescribed by statute.” (Ibid.)
The critical distinction in the rule enunciated by Scotsman is that between services rendered in an advisory capacity and services which qualify one as an expert witness. (See ibid.) Nevertheless, so far as we can determine, California courts heretofore have not expressly elaborated on this aspect of Scotsman. We believe some elucidation would be beneficial.
We hold that an expert’s report rendered in an advisory capacity is one designed to assist the attorney in such matters as preparation of pleadings, the manner of presentation of proof, and cross-examination of opposing expert witnesses; matters that are often reflective of the mental processes of the attorney under whose direction the expert works. (See
State
v.
Circuit Court for Milwaukee County
(1967)
Applying the above analysis, it will often be necessary for the trial judge to conduct a three-step
in camera
inspection of the report of an expert identified as a witness in order to rule on the claim of the attorney’s work product privilege. (Cf.
Fellows
v.
Superior Court, supra,
First the judge should determine if the report, in whole or part, “. . . reflects an attorney’s impressions, conclusions, opinions, or legal research or theories . . . .” (Code Civ. Proc., § 2016, subd. (b).) The work product that this definition represents is absolutely privileged; it cannot be discovered under any circumstances. (Ibid.) The judge need go no further in his *490 analysis unless all or easily severable portions of the report do not so reflect the thoughts of an attorney.
Steps two and three of the in camera inspection are applicable only to those portions of the report that are not absolutely privileged. In step two the trial judge should determine whether the report, in whole or part, is advisory or not pursuant to the above elaboration of Scotsman. The portions of the report that are advisory are protected by the conditional work product privilege; the portions that are not advisory are discoverable if easily severable.
Finally, in step three, which is applicable only to advisory portions of the report that are not absolutely privileged, if any, the judge should determine whether other good cause for discovery outweighs the principles supporting the conditional work product privilege. (See
Petterson
v.
Superior Court, supra,
Real party in interest contends another compelling reason exists to obtain the engineering report of petitioner’s expert witness even though it was originally prepared for prior litigation, in that the prior report may impeach the expert witness’ new findings and testimony. In this regard there is also no comparable substitute for the prior report.
These factors, if supported by an
in camera
inspection of the report, are in combination sufficiently significant to be weighed against the work product privilege. To begin with, the need for pretrial discovery to prepare for cross-examination and rebuttal of an expert witness is the same or greater than it is with a lay witness.
(Kennemur
v.
State of California
(1982)
By declaration for petitioner the expert states that he did not refer to or rely on his prior report in preparing for the instant litigation. Nevertheless, “. . . it is important to permit an expert witness to be cross-examined concerning those publications referred to or considered by him even though not specifically relied on by him in forming his opinion. An expert’s reasons for not relying on particular publications that were referred to or considered by him while forming his opinion may reveal important information bearing upon the credibility of his testimony.” (Law Revision Com. com., Deering’s Ann. Evid. Code (1966 ed.) § 721, p. 533, italics added.) Here it is reasonable to infer that the expert considered his prior engineering report in his preparations for trial. This is because the expert’s prior report and current preparations had much in common; both were completed to help defend against civil lawsuits that concerned petitioner’s design and fabrication of metal buildings. Moreover, the prior report was compiled within five years of the expert’s instant preparations for trial.
Determining whether “ . . denial of discovery will unfairly prejudice the party seeking discovery in preparing his claim or defense or will result in an injustice . . .’ [Code Civ. Proc., § 2016, subd. (b)] ... requires that a court weigh carefully the power of impeachment as a valuable tool in the process of truth ascertainment against the benefits of protecting the privilege of ‘work product’ ”
(Jasper Construction, Inc.
v.
Foothill Junior College Dist.
(1979)
Another compelling reason for permitting discovery is the inability to obtain an adequate substitute for that which is sought by discovery. In
Petterson
v.
Superior Court, supra,
Therefore, in step three of the judge’s in camera inspection of the expert’s report, the impeachment value and uniqueness of the portions of the report remaining for evaluation after steps one and two should be weighed against the protections of the conditional work product privilege.
Relevance
Petitioner contends that even if the attorney-client and work product privileges are inapplicable, the trial judge should order the prior New York report to be produced only to the extent relevant to the issues raised in the instant litigation. Further, petitioner contends that because real party in interest “. . . in its interrogatory responses had alleged simply that the Banning building violated only a specific provision of the American Institute of Steel Construction’s Manual of Steel Construction AISC, Section 1.10.10,” the report and calculations should be produced only to the extent they concern this specific provision. We agree that on remand the trial judge should evaluate the relevance of the New York report, but find the application of this concept suggested by petitioner to be erroneous. Petitioner misreads the interrogatory response of the real party in interest. Real party in interest’s response did not allege that only section 1.10.10 of the American Institute of Steel Construction (AISC) manual was violated, but rather that AISC manual section 1.10.10 et seq. were violated. Moreover, it appears from answers to other interrogatories that real party in interest is still awaiting information; such information might lead to further specific allegations.
With these facts in mind, we turn to a brief analysis of the scope of discovery permitted by law for consideration by the trial judge when he conducts the in camera inspection of the New York report on remand.
The trial court has broad discretion in ruling on discovery, and will only be overturned for an abuse of discretion.
(Perkins
v.
Superior Court
(1981)
Disposition
It Is Ordered that a peremptory writ of mandate issue commanding the Riverside Superior Court to set aside its order granting unlimited discovery of the report and to conduct an in camera inspection of the expert’s report to determine, consistent with this opinion, (1) the extent to which the report is protected by the work product privilege, and (2) whether the report is relevant. The Riverside Superior Court shall allow discovery of the report to the extent that it is both unprotected and relevant.
McDaniel, J., and Ricldes, J., concurred.
Notes
The parties dispute whether the New York report is relevant to the instant litigation. Although neither this court nor real party in interest have seen the report, we will assume for purposes of discussing the attorney-client and work product privileges below that the report is relevant. We make this assumption because the previous report and the allegations here both involve the design and fabrication of metal buildings by petitioner. Nevertheless, as we also discuss below, to the extent the report upon inspection is found to be irrelevant, this is an independent basis for holding the report to be nondiscoverable.
On its surface
Grand Lake Drive In
v.
Superior Court, supra,
It might be argued that when an expert is reasonably certain to be a witness,
Scotsman
limits discovery to “. . . the product of services which qualify him as an expert witness . . .,” regardless of whether other good cause for discovery exists. (See
Scotsman Mfg. Co.
v.
Superior Court, supra,
