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Summary of Recommended Standardized Procedures and Guidelines 11 Table 1. Summary of items examined in project. Categories Ref Item Type of Recommendation Section Design of Survey I-1 Minimum Question Specification Standardized Procedures 2.1.1 Instruments I-2 Standardization of Categories Standardized Procedures 2.1.2 I-5 Standard Question Wordings Standardized Procedures 2.1.3 Design of Data D-1 Number and Type of Contacts Standardized Procedures 2.2.1 Collection D-3 Proxy Reporting Standardized Procedures 2.2.2 Procedures D-4 Complete Household Definition Standardized Procedures 2.2.3 D-6 Sample Replacement Guidelines 2.2.4 D-7 Item Non-response Standardized Procedures 2.2.5 D-8 Unit Non-response Standardized Procedures 2.2.6 D-10 Initial Contacts More Research 2.2.7 D-13 Incentives Guidelines 2.2.8 D-14 Respondent Burden Standardized Procedures 2.2.9 Pilot Surveys and P-2 Requirements for Pretests or Pilots Standardized Procedures 2.3.1 Pretests and Guidelines P-3 Sample Sizes for Pretests and Pilots Standardized Procedures 2.3.2 Survey E-2 Ethics Standardized Procedures 2.4.1 Implementation E-3 Mailing Materials Standardized Procedures 2.4.2 E-4 Respondent Questions Standardized Procedures 2.4.3 E-5 Caller ID Standardized Procedures 2.4.4 E-9 Answering Machines and Repeated Standardized Procedures 2.4.5 Call-Back Requests E-10 Incorrect Reporting of Non-Mobility Standardized Procedures 2.4.6 E-11 Recording Time of Day Standardized Procedures 2.4.7 E-12 Time of Day to Begin and End Standardized Procedures 2.4.8 Reporting E-13 Creation of Identification Numbers Standardized Procedures 2.4.9 and Guidelines Data Coding C-1 Geocoding Standards Standardized Procedures 2.5.1 Including C-2 Level of Geocoding to be Performed Standardized Procedures 2.5.2 Geocoding C-4 Missing Values, Use of Zero, Etc. Standardized Procedures 2.5.3 C-5 Coding Complex Variables Standardized Procedures 2.5.4 and Guidelines Data Analysis and A-1 Assessing Sample Biases Standardized Procedures 2.6.1 Expansion A-2 Weighting and Expansion of Data Standardized Procedures 2.6.2 A-3 Missing Data Imputation Standardized Procedures 2.6.3 A-4 Data Archiving Standardized Procedures 2.6.4 A-6 Documentation Standardized Procedures 2.6.5 Assessment of Q-1 Computing Response Rates Standardized Procedures 2.7.1 Survey Quality Q-2 Transportation Measures of Quality Standardized Procedures 2.7.2 Q-3 Coverage Error Standardized Procedures 2.7.3 Q-5 Proxy Reporting as a Quality Indicator Standardized Procedures 2.7.4 Q-6 Validation Statistics Standardized Procedures 2.7.5 Q-7 Data Cleaning Statistics Standardized Procedures 2.7.6 Q-8 Number of Missing Values Standardized Procedures 2.7.7 Q-9 Adherence to Quality Guidelines Standardized Procedures 2.7.8 In making these recommendations, it is also hoped that those who are less well-informed will find this to be a useful way to define how a survey might be done that would meet current expec- tations of quality, accuracy, and comparability. To this end, also, an RFP template has been developed that incorporates the majority of the suggested standardized procedures. To be con- sistent with normal RFP language, the narrative is written in prescriptive language. This should not be misinterpreted by the casual reader as implying establishment of standards; rather, it is simply a way of presenting an RFP in its normal form. 2.1 Design of Survey Instruments 2.1.1 I-1: Minimum Question Specification This item addresses the issue of the minimum question content of a household or personal travel survey. It covers what is considered to be essential information about the demographics