CMWSSB Complaint Analytics

Category	Street	Depot	Times	Span (days)	Avg gap (days)	Per month
Sewer Main Block	Partha Sarathy Puram	113	47	513	11.2	2.75
No Water Supply	Partha Sarathy Puram	113	16	457	30.5	1.05
Water Pollution	Partha Sarathy Puram	113	4	372	123.9	0.32

Avg gap = average days between consecutive complaints of that type on that street. Lower gap / higher “per month” = a faster-recurring, unresolved problem.

🔬 Advanced Analysis

Pareto — the vital few (which categories drive most complaints)

Categories ordered by volume with their cumulative share. The highlighted rows are the smallest set that together account for ~80% of all complaints — fix these first.

Category	Count	Share	Cumulative
Sewer Main Block vital	47	64.4%	64.4%
No Water Supply vital	16	21.9%	86.3%
Water Pollution	4	5.5%	91.8%
Sewer - House Block	3	4.1%	95.9%
Water Short Supply	2	2.7%	98.6%
Sewer Machine Hole Open (or) Broken	1	1.4%	100%

When complaints arrive (weekday × time of day)

Load pattern across the week — darker cells are busier six-hour windows. Useful for staffing and planning proactive checks before the peak.

	Night	Morning	Afternoon	Evening	Total
Mon		11	3	1	15
Tue		6	3	1	10
Wed		3	3	4	10
Thu		6	5	4	15
Fri		3	4	2	9
Sat		4	2	1	7
Sun		2	4	1	7
Total	0	35	24	14	73

Linked problems (category pairs that hit the same streets)

Pairs of issue types that recur together on the same street, ranked by the number of streets where both appear. Strong pairs point to a shared root cause worth fixing in one visit.

Problem A	Problem B	Shared streets
Not enough overlapping complaints in this scope.