15. A method utilizing a computer system including a computer processor and one or more memories, the method for reviewing a collection of documents stored in electronic form in the one or more memories to identify substantially all relevant documents from the collection, the method comprising the steps of: running a first search of the collection of documents, based on a plurality of query terms of a relevant language string first formulated by a reviewer and indicated to the computer system and used by the computer processor of the computer system to automatically create an automatic Boolean query without user interaction based on applying criteria to refine the relevant language string, the computer processor using the automatic Boolean query to isolate substantially all documents from the collection of documents stored in memory that are relevant to the Boolean query, the search returning a subset of responsive documents from the collection stored in memory including all documents relevant to the Boolean query; utilizing the computer processor to automatically identify a correspondence between a sender of a particular document in the collection of documents stored in memory and a recipient of a particular document in the collection of documents stored in the memory, which are included in the subset of responsive documents; automatically determining additional documents which are determined to be in a thread of the correspondence between the sender and the recipient, but not included in the subset of responsive documents; adding the additional documents in the thread of correspondence to the subset of responsive documents; randomly selecting a predetermined number of documents from a remainder of the collection of documents not in the responsive documents subset; determining whether the randomly selected documents include additional relevant documents; comparing a ratio of the additional relevant documents and the randomly selected documents to a predetermined acceptance level; and expanding the query terms and rerunning the search with the expanded query terms, if the ratio does not meet the predetermined acceptance level.
15. A method utilizing a computer system including a computer processor and one or more memories, the method for reviewing a collection of documents stored in electronic form in the one or more memories to identify substantially all relevant documents from the collection, the method comprising the steps of: running a first search of the collection of documents, based on a plurality of query terms of a relevant language string first formulated by a reviewer and indicated to the computer system and used by the computer processor of the computer system to automatically create an automatic Boolean query without user interaction based on applying criteria to refine the relevant language string, the computer processor using the automatic Boolean query to isolate substantially all documents from the collection of documents stored in memory that are relevant to the Boolean query, the search returning a subset of responsive documents from the collection stored in memory including all documents relevant to the Boolean query; utilizing the computer processor to automatically identify a correspondence between a sender of a particular document in the collection of documents stored in memory and a recipient of a particular document in the collection of documents stored in the memory, which are included in the subset of responsive documents; automatically determining additional documents which are determined to be in a thread of the correspondence between the sender and the recipient, but not included in the subset of responsive documents; adding the additional documents in the thread of correspondence to the subset of responsive documents; randomly selecting a predetermined number of documents from a remainder of the collection of documents not in the responsive documents subset; determining whether the randomly selected documents include additional relevant documents; comparing a ratio of the additional relevant documents and the randomly selected documents to a predetermined acceptance level; and expanding the query terms and rerunning the search with the expanded query terms, if the ratio does not meet the predetermined acceptance level. 20. The method of claim 15 , further comprising the step of: applying a statistical technique to determine whether a remaining subset of the collection of documents not in the responsive documents subset meets a predetermined acceptance level.