Internal Quality Auditing System - Audit Plan per guidance from ISO 19011
This is not a template, but a list of the information that is meant to be included in an audit plan per guidance from ISO 19011:
"The audit plan should cover the following:
a) the audit objectives;
b) the audit criteria [e.g. ISO 9001, etc] and any reference documents;
c) the audit scope [e.g. manufacturing of product XYZ], including identification of the organizational and functional units and processes to be audited;
d) the dates and places where the on-site audit activities are to be conducted;
e) the expected time and duration of on-site audit activities, including meetings with the auditee’s management and audit team meetings;
f) the roles and responsibilities of the audit team members and accompanying persons;
g) the allocation of appropriate resources to critical areas of the audit.
The audit plan should also cover the following, as appropriate:
h) identification of the auditee’s representative for the audit;
i) the working and reporting language of the audit where this is different from the language of the auditor and/or the auditee;
j) the audit report topics;
k) logistic arrangements (travel, on-site facilities, etc.);
l) matters related to confidentiality;
m) any audit follow-up actions."
Essentially it could be in a memorandum format (in internal audits even an e-mail would work as an audit plan) and the intent of theplan is to aid you and the auditee in getting ready for the logistics for a particular audit. You should send your plan in advance to your auditee, e.g. one week before.