Abstract: |
The urban development process intends to enhance urban equipment,
infrastructure and services to improve urban conditions and reduce
inequalities. While planning activities usually demand a sizeable amount of
data to assess these conditions, it is hard to find a straightforward
procedure to translate these data into a comprehensive and balanced set of
projects and programs. Most urban projects have a strong sectorial character
and it is difficult to compare parks with roads or sanitation with schools.
Development projects are normally justified in their own terms, yet rarely are
sectorial demands equably met by the proposed projects. The following model
intends to facilitate this task, providing a simple yet efficient means to
assess urban conditions, evaluate and compare the sectorial demands and
assemble a balanced set of development goals that can be used to estimate the
overall investment needed. The proposed system assesses urban conditions
through a set of selected indicators, derived from a compact data base. These
indicators represent the performance of the basic urban sectors at each urban
zone, thus providing the necessary spatial component to the system. The
indicators are normalised to allow comparison of conditions between different
sectors. The values of the normalised indicators are then used to evaluate the
relative quality of services at each urban zone. By displaying the normalised
indicators as bar charts, it is easier to visualise sectorial demands and
spatial imbalances. The model is built on a spreadsheet, making fairly easy to
verify how much improvement in the sector is needed to attain the desired
performance level in each zone. New values can be entered interactively until
a preferred urban conditions pattern is attained. The information produced by
the model can be used as the basic guideline to dimension sectorial projects
and compose a comprehensive development program. Besides describing and
discussing all the procedures adopted, a simple yet complete example
illustrates the use of the model. |