In an effort to promote judicial efficiency, Courts often allow a plaintiff to supplement its complaint if doing so would settle the parties’ controversies in one action. This is the rationale Judge Alsup applied in Illumina, Inc. et al v. Qiagen N.V. et al, Case No. 16-02788 (N.D. Cal. Nov. 29, 2016) when allowing plaintiff Illumina to amend its complaint to add a newly issued patent that was granted after plaintiff filed its complaint. Judge Alsup listed several efficiency-related factors favoring supplementation: (1) the supplemental claims accuse the very same product already in the action; (2) the newly issued patent has narrower claims, so allowing them in this action would avoid duplicating some of the issues already in the case; (3) even though there are new issues associated with the supplemental claims, there is no evidence that these new issues would be so burdensome as to delay the current schedule. Thus, because of the significant commonalities between the two patents, the Court decided that it would serve the purpose of judicial efficiency to enable the parties to litigate both patents in the same case.