The Chicago accountant was tapped to replace Apple’s original expert, Terry Musika, who died late last year. But her assignment was an unusually narrow one: to walk step-by-step through her predecessor’s calculations, adjusting them for a shorter time window, and testify to the resulting figure.

Although she is a newcomer to the blockbuster case, Davis did not blink in the face of her adversary, Samsung lawyer William Price. The partner at Quinn Emanuel Urquhart & Sullivan prodded Davis to concede that Apple typically rolls out one new product a year. Samsung, he claimed, introduces new products and features around the world each day.