Function validate_cell_layout 

pub fn validate_cell_layout(
    linear_cycle_time: f64,
    linear_balance_delay: f64,
    cell_cycle_time: f64,
    cell_balance_delay: f64,
    throughput_linear: f64,
    throughput_cell: f64,
) -> Result<TpsTestResult, String>

Validates Cell Layout Design effects.

TC-7: Physical layout significantly impacts performance

Balance Delay Loss formula: D = (n × CT - Σ task_times) / (n × CT) where n = number of stations, CT = cycle time

U-line and cell layouts reduce balance delay through:

• Better work distribution
• Reduced transportation waste
• Easier load balancing

Errors

This function always returns Ok. The Result type is for consistency.