Lotus technical director James Allison is optimistic having missed the second preseason test will not be a big setback for the team as it prepares to get back on track tomorrow.
The team decided to pull out of the Barcelona test last week after it found a problem with its chassis right after Romain Grosjean took to the track for the first time. Lotus has now worked to fix the problem and will be on track from tomorrow for the final test at Barcelona.
Allison admitted missing four days of running was a setback, but says there are reasons to be optimistic.
"Of course, missing four days of testing is not ideal," said Allison. "We need mileage at this stage of the year, as does any other team. That said, there are reasons to remain optimistic.
"First of all, we completed many trouble-free laps in Jerez and gained a good understanding of the car. Also, some of the small issues we identified in Jerez needed to be fixed, and the parts were not available last week. On Thursday, the car will run with all the required redesigned parts. We're looking forward to being back on track."
When asked if he was confident about the repair, he said: "Yes."
Allison revealed the car is now slightly heavier, but he is confident it won't impact performance much.
"We're only talking about 1kg, which is manageable," he said. "It won't have any significant impact on handling or performance."
With regard to the problem that caused the delay, he explained, he added: "We saw immediately that we had a problem with the mounting of the upper front wishbone rear arm."
Allison said the chassis did not have to pass the mandatory crash tests again, but he admitted it had been a very busy couple of days.
"It's been an intense few days, but I have to say that everybody has completed their tasks in tremendous fashion. On the first day back at the factory, I spoke to the entire Enstone [UK factory] personnel and clearly explained what happened. Everybody understood that the situation was unfortunate, but under control.
"We designed the new parts, manufactured them, and fitted them to the chassis. We then completed the necessary tests satisfactorily and the chassis left for Spain."
Lotus will use chassis 01 this week at Barcelona, while chassis 02 will be used as a spare from now on.