The request for offer and the offer will be annexed to the specific contract/order form which  will enter into force upon its countersignature by the contractor. Fixed price specific contract/order form will cover deliverables clearly defined by EFSA  within a fixed duration and with a fixed price. The euro amount of the fixed price is based on an expert judgement of the effort  necessary to complete the deliverables and takes into account the price per person per  day from the financial offer.  Fixed priced specific contracts /order forms will be used when EFSA can clearly define the  exact deliverables and the delivery date in the specific contracts /order forms.  Time and means specific contract/ order forms cover a specific number of person-days and  the specific profiles. The euro amount will be based on the price per person-day as provided in the Financial  Offer A person-day is considered to be 8 hours work.  Time and means specific contract/order form will be used when due to the nature of the  working activity, it is not possible to accurately estimate the efforts necessary to achieve  the results, but it is possible to define a number of person-days (or hours) and the specific  profiles. To track the activities EFSA will request timesheets, which will be submitted regularly using  the EFSA template (to be provided by EFSA to the Contractor); timesheets must specify  the number of days/ hours and activities worked on, and be approved by EFSA. Approval of the timesheet by EFSA will be deemed to be given via email from the  responsible Project Officer confirming the days/ hours recorded in the timesheet have been  checked and performed. EFSA does not counter-sign the timesheets. If the number of days/ hours ordered have not been carried out, EFSA shall not be obliged  to use or pay for the remaining days and the Contractor shall not be entitled to claim  associated damages. For most services, orders will be placed for person days or half days and the time-sheet  applied will track effort in terms of days and half days. However, for some activities, e.g.  on-line training courses, hourly orders may apply, in which case the hourly rate will be  calculated based on the daily rates in the financial offer (8 hours/day).  11  Time and means specific contracts/ order forms  Fixed prices specific contract/ order forms  Specific contract/ order form  For time and means specific contract/order form:  • The contractor’s offer must include: o the proposed persons: proposed profiles including the project  manager, names and CVs and Declaration of Interest (if not already  provided at FWC signature): ▪ All people who are proposed through CVs must be available,  only upon EFSA’s request, for interviews. The objective of  these interviews will be to assess the technical competences  of the expert according to the requirements of EFSA’s request.