Uploaded on 2014-12-07 by GB75

![enter image description here][1] [1]: https://edxuploads.s3.amazonaws.com/14179598385468317.jpg Infrastructure is the structure we have to check and repair while using it. In case of a plumbing of waterworks, it is necessary to reserve the other route to block the road. (In Japan), the tap water is used as a drink, so the user has to secure the drink for whole stop of water supply. When changing a part with which the water pipe and each house are connected, the individual agreement is needed beforehand. It is constructed every small parcel in turn to reduce influence of the construction to an area stretch. Therefore there is always the construction of Infrastructure somewhere. The maintenance of Infrastructure is very important. However, it is a big burden for the user. Now, it will be necessary to reconsider dependence to Infrastructure, and to design the Infrastructure which maintenance is included.