A few of the things you can sort out at this phase include determining the content in your gap analysis questionnaire and deciding on the format.
A second-party audit is when an organization with a pre-existing relationship, such as a customer performs an audit of a supplier to ensure that they are meeting the requirements, such as those specified in their contract.
These requirements may include special control over certain processes, requirements for pollution prevention or compliance evaluation, requirements for specific documentation, or any other requirements that are of special interest to that customer.
These audits can be done on-site by reviewing the processes or even off-site by reviewing documents submitted by the supplier. The customer can audit all or parts of the contract depending on the needs of the customer. It is important to understand that a second-party audit is between the customer and the supplier.
Even if you are certified by a third-party audit, your customers may still want to perform a second-party audit to look at elements of their contract, especially if these elements are not the same.
A gap analysis is mainly a determination of the degree of conformance of your organization to the requirements of a specification or standard. A gap analysis is mainly a document review or a “show me the evidence” activity, evidence which usually will come in the form of a record or document.
The gap analysis will identify the 'gaps', allowing you to produce a more accurate project plan for filling those gaps.
A gap analysis is a survey - often using a checklist - which determines the differences (gaps) between an organization's current business systems and the requirements of controlling criteria, such as standards like ISO 9001:2015. It is geared towards ISO 9001, but can also be applied to ISO 14001, 45001, 27001 etc.