What is the test for ineffective assistance of counsel when a plaintiff fails to produce evidence promised in their opening statement?

Appellant acknowledges that the failure to present evidence promised in an opening statement is not necessarily ineffective assistance and can be a reasonable tactical decision. "Whether the failure to produce a promised witness amounts to ineffective assistance of counsel is a fact-based determination that must be assessed on a case-by-case basis. [Citation.] Forgoing the presentation of testimony or evidence promised in an opening statement can be a reasonable tactical decision, depending on the circumstances of the case. [Citations.]" (People v. Stanley (2006) 39 Cal.4th 913, 955.)