*414 OPINION OF THE COURT
Daniel Padillas was injured while washing down the blade of a drum and thigh cutter (“DTC” or “the machine”) designed, manufactured and sold by Stork-Gamco, Inc. (“Stork”) and owned and operated by his employer, Pennfield Farms. The DTC carries chicken carcasses, hanging by their legs, toward a horizontally rotating blade which separates the drumstick from the thigh. The injury occurred when the high-powered hose Padillas was using to clean the machine became entangled in the overhead conveyor and drew his left forearm into the unguarded edge of the rotating blade. Padillas brought this action against Stork, alleging strict products liability, negligence, breach of warranty and failure to warn. Stork moved for summary judgment, arguing that the report of Padillas’ expert, Ralph Lambert, did not meet the test of
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
I. PLAINTIFF ESTABLISHED MATERIAL ISSUES OF FACT FOR TRIAL
Our review of a summary judgment is plenary.
See Childers v. Joseph,
Stork moved for summary judgment on the ground that “[tjhere is no competent evidence of record in this case to satisfy the Azzarello standard.” The district court held that “[t]he only evidence of defect that Padillas proffered to defend against the motion of Stork-Gamco ... was the report from his expert, Ralph Lambert.” Having concluded that this report was not admissible under Federal Rule of Evidence 702, the court determined that Stork had met its burden under Federal Rule of Civil Procedure 56 and granted the motion. The threshold question, therefore, is whether Padillas offered evidence apart from the Lambert Report sufficient to raise a triable issue of fact.
Because this is a diversity case, Pennsylvania products liability law controls. The Pennsylvania Supreme Court held, in
Azzarello v. Black Brothers Co.,
(1) A report (predating the accident) coauthored by Stork-Gamco’s engineering manager responsible for the design of the Stork machines addressing problems with the machine that injured Padillas, including “ Safety concerns — not well guarded.”
(2) A memorandum (also predating the accident) from a Pennfield employee to a representative of Stork referring to the machine’s “Safety Problems ... Many blades unguarded.”
(3) Evidence that the design of this machine was derived from a machine designed and manufactured by Stork’s sister company, which provides a guard extending over a larger segment of the cutting edge of the blade, both vertically and horizontally, than the guard on the machine at which Padilla was injured.
(4) Evidence that following the accident, Pennfield installed a fubular steel guard at the point where the Stork guard had ended.
This evidence is probative of the existence of a condition that a reasonable jury may find made the machine unsafe for its intended use. We must consider, however, whether a jury would be permitted to return a verdict on this evidence standing alone, assuming the exclusion of the Lambert Report. If so, summary judgment was erroneously granted.
We have not directly addressed the specific issue of when expert evidence is required in a products liability case although we have declared, in dictum, that “[i]n addition to expert testimony on design defect, a defective condition in a product can be established by the presentation of other types of circumstantial evidence.”
Barris v. Bob’s Drag Chutes & Safety Equip., Inc.,
Wilburn
relied on
Salem v. United States Lines,
II. THE COURT FAILED TO FOLLOW PROPER PROCEDURE IN EXCLUDING EXPERT EVIDENCE
As a part of its opposition to Stork’s summary judgment motion, Padillas offered a report prepared by Ralph A. Lambert, a mechanical engineer with over twenty-five years of in-plant and technical experience in industrial operations, maintenance and construction systems, and manufacturing process design, including food processing machinery. Lambert’s report detailed his findings regarding the machine and analyzed its operation. It concluded, in substance, that the failure to provide a guard that prevented the snagging of the hose during wash-down and to provide protection for workers against contact with the cutting blade “resulted in a defective machine with a dangerous and hazardous condition that was the cause of the accident.”
The district court correctly ruled that the analysis under
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
Lambert provides no basis for the conclusions and observations that he makes. He does not indicate his research or experience in this area. His curriculum vitae indicates he has had experience with cutting machines, but it does not indicate whether he has experience in the design of these machines from which some methodology or design efficacy might emerge. He does not set forth in his report the methodology by which he made his determinations in this case. He does not indicate that he conducted any tests or what the testing techniques were.... [H]e mentions the four “recognized” levels of analysis of a hazardous work zone on a machine, but he does not provide citations as to where these levels of analysis are derived or by whom they are recognized. Lamberts’s comparison of the Stork-Gamco Drum and Thigh Cutter to another model of cutting machine is not helpful, mainly because the other model has a different guard, and I find that attempt at comparison is confusing. Lambert does not explain or provide support as to whether this different guard would have been viable on the Drum and Thigh Cutter or how it would have prevented Padillas’ injuries.
*417 The Lambert Report is filled with conclusory statements about the defective condition of the Drum and Thigh Cutter and how it caused Padillas’ injury. However, the only support for these conclusions are Lambert’s own beliefs, which ... in totality fail to include any of the Daubert or Downing factors and thus are not enough to sustain the burden upon Padillas in this case.
We do not reach the question whether the district court abused its discretion in holding the Lambert Report to be inadmissible under Rule 702.
See General Elec. Co. v. Joiner,
We have long stressed the importance of in limine hearings under Rule 104(a) in making the reliability determination required under Rule 702 and
Daubert. See United States v. Downing,
The adversarial process upon which our legal system is based assumes that a fact finder will give the parties an adequate opportunity to be heard; if it does not, it cannot find facts reliably. Thus, the detailed factual record requirement, firmly entrenched in our jurisprudence, requires adequate process at the eviden-tiary stage, particularly when a summary judgment may flow from it.
Id.
(citations omitted). We reiterated our
Paoli
holding in
Hines v. Consolidated Rail Corp.,
Given the “liberal thrust” of the federal rules it is particularly important that the side trying to defend the admission of evidence be given an adequate chance to do so.
Id. at 739 (citation omitted); see also Margaret A. Berger, Procedural Paradigms for Applying the Daubert Test, 78 Minn. L.Rev. 1345, 1365 (1994) (reviewing admissibility of expert testimony in light of the “liberal thrust” of the Federal Rules of Evidence).
That plaintiff may not have requested a hearing — as the district court noted — is immaterial for at least two reasons. First, because the court has an independent responsibility for the proper management of complex litigation.
See Paoli,
The district court’s analysis of the Lambert Report does not establish that Lambert may not have “good grounds” for his opinions,
see Daubert,
The fact that Daubert can be used in connection with summary judgment motions does not mean that it should be used profligately. A trial setting normally will provide the best operating environment for the triage which Dau-bert demands.... [G]iven the complex factual inquiry required by Daubert, courts will be hard-pressed in all but the most clearcut cases to gauge the reliability of expert proof on a truncated record.
Cortes-Irizarry v. Corporacion Insular De Seguros,
An in limine hearing will obviously not be required whenever a Daubert objection is raised to a proffer of expert evidence. Whether to hold one rests in the sound discretion of the district court. But when the ruling on admissibility turns on factual issues, as it does here, at least in the summary judgment context, failure to hold such a hearing may be an abuse of discretion. We hold that in this case, it was. Accordingly, we VACATE the ruling excluding the Lambert Report but express no view on the merits of the ruling.
The judgment is REVERSED and the matter REMANDED for further proceedings.
Notes
. Under the analysis adopted by the district court, it bypassed the threshold determination
*415
as to whether the product’s condition justifies placing the risk of loss on the manufacturer, a question of law that remains to be addressed by the court on remand.
See Surace,
. Given the posture of this case, and the district court's narrow ruling on lack of evidence of a defect, we need not consider other potential issues that may arise in this products liability action.
. Federal Rule of Evidence 104(a) provides that "[p]reliminary questions concerning the qualification of a person to be a witness ... or the admissibility of evidence shall be determined by the court.”
