案例 / 计划与控制
计划与控制

从orçamento构建cronograma físico-financeiro

以已计价的orçamento为源,给工作排序,把每个条目与产生该条目价值的活动关联起来,把资金分摊到各期,证明各期之和等于合同总额,并随投标一并公布该曲线。

6 个步骤16 分钟总承包商开发商/业主项目/施工管理公司

运作方式,逐步说明

贯穿平台的 6 个步骤 - 每一步做什么,以及为什么重要。

1

Start from the priced orcamento, not from a summary

工程量清单

Open the priced bill and confirm that every item carries a quantity, a unit and a value, and that the group structure is the one the cronograma will report against. Fix the structure here rather than inventing a second grouping for the schedule.

原因: Lei 14.133 of 2021 requires the works package to carry a detailed budget grounded in measured quantities, so the bill is the legal source of the figures and the cronograma is a view of it. A curve built from a summary sheet quietly becomes a third document with a total of its own, and the first medicao is where the three are discovered to disagree.

输入Priced bill positionsItem groups of the orcamento成果Contract total to be spreadQuantities behind every figure
2

Sequence the work into a programme

4D 进度

Build the activities the work is actually done in, give each one a duration that comes from the quantity and the crew rather than from the calendar you would like, and set the dependencies between them. Name the milestones the contract will be measured against.

原因: The physical half of the cronograma is the half that gets skipped, because the financial half can be produced by dividing the total into equal months and nobody notices for a quarter. A programme built from quantities and crews is the only version that answers the question the client will ask in month three, which is whether the plan was ever achievable.

输入Method and crew sizesQuantities behind every figure成果Baseline programmeMilestone dates named
3

Link every item to the activity that earns it

5D 造价模型

Attach each bill item to the activity that will earn it, splitting an item across two activities where the work really is done in two places. Then look at what is left over on both sides: items no activity earns, and activities that earn nothing.

原因: The leftovers are the finding. An item nothing earns is usually work that was priced and then left out of the plan, and an activity earning nothing is usually work that will be done and was never priced. Both are cheap to fix now and expensive to discover during a medicao, when one of them is already built.

输入Baseline programmePriced bill positions成果Every item linked to an activityItems no activity earns
4

Spread the money over the measurement periods

财务

Let the linked values fall into the periods the contract measures in, and read the cumulative curve as well as the monthly bars. Note the month of peak funding and what the advance, if there is one, does to it.

原因: The client reads the cronograma as a budget commitment and the contractor reads it as working capital, and the two readings meet at the peak. Named in advance it is a financing decision. Discovered in month five it is a conversation about slowing the work down, which costs both parties more than the finance would have.

输入Every item linked to an activityMeasurement periods of the contract成果Cash forecast per periodPeak funding named
5

Prove the periods add up to the contract sum

校验

Run the check that the sum of the periods equals the total of the priced bill, and that no period is negative or empty in the middle of continuous work. Chase any difference back to the item that caused it rather than adjusting the last month to close it.

原因: A cronograma that does not total to the contract sum will be rejected on sight, and closing the gap by editing the final month hides whatever caused it, usually an item linked twice or linked to nothing. The check takes seconds and the diagnosis it gives is the part worth having.

输入Cash forecast per periodContract total to be spread成果Validation report on the totalsDifference to explain
6

Publish it as the baseline the medicoes report against

报告

Export the physical and the financial halves as one document with the same period headings, and keep the version that went with the proposal as the baseline. Later revisions are compared against it rather than replacing it silently.

原因: Every medicao is read against the cronograma, and the whole conversation about delay depends on which version of it both sides are holding. A baseline kept as issued makes the comparison a fact. A cronograma quietly updated each month makes the job look on programme until the last month, when the remaining work no longer fits in it.

输入Cash forecast per periodBaseline programme成果Cronograma export for the proposalBaseline the medicoes report against
模块

此方案使用的模块

190 个平台模块中的 6

The market this case is written for

巴西

Everything in this case follows how construction work is measured, priced and paid for in this market. The forms, the cost breakdown and the payment rules are the ones used there, not a generic version of them.

Standards it follows

  • Lei 14.133
  • SINAPI
  • ABNT NBR 12721

You do not have to set any of that up by hand. The first time you open the platform it asks which market you work in. Choose this one and it sets the interface language, loads the matching cost database and records the cost classification, and it adds an example project you can open straight away.

The rule checks for this market come with the platform too. Switch them on once and an estimate that misses something the market expects is flagged while you are still working on it, not after the tender has gone out.

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