来年度のpipe replacement programを経営陣に提示するための支援が必要です

Question

<\/HEAD>皆さん、こんにちは、 <\/P> <\/P> 私は地方自治体で働いており、私の役割の一つは来年度のwater main（およびsewer）renewal programの立案を支援することです。 <\/P> <\/P> 各パイプ区間はマッピングされており、それぞれに個別のasset id、設置年、建設材料、直径などの情報があります。<\/P> <\/P> さらに、各パイプ区間に対して記録されたすべてのburstやfaultを1対多の関係で結合した別のテーブルもあります。そしてこれが経営陣が私に意見を求めている内容です。彼らは「破損やfaultの履歴に基づいて交換すべきwater mainsのリスト」を提示するよう依頼しています。<\/P> <\/P> 同様のプロジェクトを過去に行った方がいれば、その際どのように提示したか知りたいと思っています。<\/P> <\/P> 単純に故障記録数が多い順から少ない順にパイプを並べることもできますが、それが最も効果的な方法だとは思いません。 <\/P> <\/P> この情報をまとめて提示する方法について、他にアイデアがあれば教えていただけますか？<\/P> <\/P> お時間ありがとうございます。<\/P><\/BODY><\/HTML>

MartinPflanz · Answer

Ben,

Pipe scoring is quite a popular topic for water system groups!  I have seen the pipe score most commonly set by a weighted average of: material, age, and breaks.  That weighted average depends on how important each variable is at an organization - an older system may rank age differently then a newer system.  There are some secondary and, al be it, a bit more complicated variables such as criticality (if you lose this pipe how big of a deal is it? who is out of water? is delivery impacted? if so, by how much), pipe embedment type, installer, and also the normal operating pressure (normally high pressure or normally low pressure for that particular pipe).  Hydraulic analysis tools are available help evaluate the hydraulics questions.  Once you have the metrics for each pipe calc'd, consider using Insights for ArcGIS (Water Analytics) to ready the message for management's decisions.

~Martin

JoeBorgione · Answer

The scoring concept is interesting, so no that's not overly complicating things. You know you management better than I; what are they going to be looking for?  There are times the K.I.S principle wins too:  Keep It Simple.

The thing is, you are in the drivers seat here and if you present them with a couple different approaches, my guess is thier reaction is going to be ' Hmmm.  This guy is on to something...'

BenVan_Kesteren1 · Answer

Yeah thanks for that. There is another guy in my team who will be providing his list of pipes he wants repaired based on material+age calculation (no . So mine is purely a spatial question.

So I was thinking to make it 'fair' that I get the total length of the pipe, then divide it by the number of bursts, to get a 'score'. The higher the score the worse off the pipe. Does this make sense?

For example a pipe segment that is only 10m long, may have two bursts, and a pipe that is 1km long may also have two bursts, and I think the shorter pipe should be replaced before the 1km, as it has more bursts per lineal meter.

Does this make sense to others? Or am I over/under complicating it?

Thanks