# A1.1 Introduction

Effective management of drinking water quality requires appropriate attention to system analysis and system management. The objectives are to increase understanding of:

* the entire water supply system from catchment to consumer
* the hazards, sources and events that can compromise drinking water quality
* the preventive measures needed to effectively control hazards, including the application of multiple barriers and the establishment of critical control points to reduce exposure to hazards.

Figure A1.1 provides a suggested roadmap to assist in the application of these aspects of the Framework. Further guidance on implementing these aspects is offered in the following text.

### Figure A1.1 Application of Framework elements 2 and 3 <a href="#fig-a1-1" id="fig-a1-1"></a>

<figure><img src="/files/56HAWITiM1fFbFhIPHc2" alt=""><figcaption></figcaption></figure>


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