# Analysis of urban necessities reserve index and reserve quantity under emergency conditions

## TL;DR

This paper develops a scientific method to determine what and how much daily necessities should be stored in cities during emergencies, using Shanghai as a case study.

## Contribution

A novel index model and reserve list for emergency daily necessities, addressing subjective biases and mismatches in existing methods.

## Key findings

- An index model for daily necessities reserve was established to determine 'what to store'.
- A reserve model was developed to classify and manage the reserve levels of different necessities.
- Countermeasures were proposed to optimize material structure and reduce reserve costs.

## Abstract

While maintaining a robust reserve of daily necessities is crucial for urban safety, but there is a lack of scientific basis for determining “what to store” and “how much to store.” This paper address this gap by classifying and summarizing the emergency materials of urban necessities in Shanghai, and establishing a corresponding reserve list. By constructing an index model of daily necessities reserve, this paper provides a scientific foundation for “what to store.” Additionally, the reserve levels of different types of daily necessities are classified and managed, the reserve model of emergency daily necessities is constructed. This approach clarifies the scientific basis for “how much to store,” overcoming the problems of subjective factors interference and the potential mismatch between the results of objective weighting method and reality. Furthermore, to better cope with emergencies, countermeasures and suggestions are put forward: optimizing the material structure of emergency reserves, managing the material reserves at different levels, scientifically and reasonably planning the amount of emergency materials, and reducing the cost of reserves and improve the efficiency of emergency reserves.